Malware analysis PDFixers.exe Malicious activity | ANY.RUN

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File name:	PDFixers.exe
Full analysis:	https://app.any.run/tasks/47e18b97-81eb-4285-ae82-d108b777c014
Verdict:	Malicious activity
Threats:	Stealers are a group of malicious software that are intended for gaining unauthorized access to users’ information and transferring it to the attacker. The stealer malware category includes various types of programs that focus on their particular kind of data, including files, passwords, and cryptocurrency. Stealers are capable of spying on their targets by recording their keystrokes and taking screenshots. This type of malware is primarily distributed as part of phishing campaigns. Malware Trends Tracker >>>
Analysis date:	September 04, 2024, 20:29:37
OS:	Windows 10 Professional (build: 19045, 64 bit)
Tags:	stealer
Indicators:
MIME:	application/x-dosexec
File info:	PE32+ executable (GUI) x86-64 Mono/.Net assembly, for MS Windows
MD5:	B4440EEA7367C3FB04A89225DF4022A6
SHA1:	5A6C01F821F10F6ED1F1283ECBA36C5BACFB5838
SHA256:	A024A18E27707738ADCD7B5A740C5A93534B4B8C9D3B947F6D85740AF19D17D0
SSDEEP:	98304:NKaPGf3Lx51clR43g0ZtKC5/TF4i9bYvQCPjhPXq2fZWwZmchG6QjvOr/av7Vx6U:Lm3qrzPw0jtrQp

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.

Launch configuration

Task duration:: 60 seconds
Heavy Evasion option:
Network geolocation:: off
Additional time used:: none
MITM proxy:: off
Privacy:: Public submission
Fakenet option:: off
Route via Tor:: off
Autoconfirmation of UAC:: on
Network:: on

Software preset

Internet Explorer 11.3636.19041.0
Adobe Acrobat (64-bit) (23.001.20093)
Adobe Flash Player 32 NPAPI (32.0.0.465)
Adobe Flash Player 32 PPAPI (32.0.0.465)
CCleaner (6.20)
FileZilla 3.65.0 (3.65.0)
Google Chrome (122.0.6261.70)
Google Update Helper (1.3.36.51)
Java 8 Update 271 (64-bit) (8.0.2710.9)
Java Auto Updater (2.8.271.9)
Microsoft Edge (122.0.2365.59)
Microsoft Edge Update (1.3.185.17)
Microsoft Office Professional 2019 - de-de (16.0.16026.20146)
Microsoft Office Professional 2019 - en-us (16.0.16026.20146)
Microsoft Office Professional 2019 - es-es (16.0.16026.20146)
Microsoft Office Professional 2019 - it-it (16.0.16026.20146)
Microsoft Office Professional 2019 - ja-jp (16.0.16026.20146)
Microsoft Office Professional 2019 - ko-kr (16.0.16026.20146)
Microsoft Office Professional 2019 - pt-br (16.0.16026.20146)
Microsoft Office Professional 2019 - tr-tr (16.0.16026.20146)
Microsoft Office Professionnel 2019 - fr-fr (16.0.16026.20146)
Microsoft Office профессиональный 2019 - ru-ru (16.0.16026.20146)
Microsoft OneNote - en-us (16.0.16026.20146)
Microsoft Update Health Tools (3.74.0.0)
Microsoft Visual C++ 2013 Redistributable (x64) - 12.0.30501 (12.0.30501.0)
Microsoft Visual C++ 2013 x64 Additional Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2013 x64 Minimum Runtime - 12.0.21005 (12.0.21005)
Microsoft Visual C++ 2015-2022 Redistributable (x64) - 14.36.32532 (14.36.32532.0)
Microsoft Visual C++ 2015-2022 Redistributable (x86) - 14.36.32532 (14.36.32532.0)
Microsoft Visual C++ 2022 X64 Additional Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X64 Minimum Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X86 Additional Runtime - 14.36.32532 (14.36.32532)
Microsoft Visual C++ 2022 X86 Minimum Runtime - 14.36.32532 (14.36.32532)
Mozilla Firefox (x64 en-US) (123.0)
Mozilla Maintenance Service (123.0)
Notepad++ (64-bit x64) (7.9.1)
Office 16 Click-to-Run Extensibility Component (16.0.15726.20202)
Office 16 Click-to-Run Licensing Component (16.0.16026.20146)
Office 16 Click-to-Run Localization Component (16.0.15726.20202)
Office 16 Click-to-Run Localization Component (16.0.15928.20198)
PowerShell 7-x64 (7.3.5.0)
Skype version 8.104 (8.104)
Update for Windows 10 for x64-based Systems (KB4023057) (2.59.0.0)
Update for Windows 10 for x64-based Systems (KB4023057) (2.63.0.0)
Update for Windows 10 for x64-based Systems (KB4480730) (2.55.0.0)
Update for Windows 10 for x64-based Systems (KB5001716) (8.93.0.0)
VLC media player (3.0.11)
WinRAR 5.91 (64-bit) (5.91.0)
Windows PC Health Check (3.6.2204.08001)

Hotfixes

Client LanguagePack Package
DotNetRollup
DotNetRollup 481
FodMetadata Package
Foundation Package
Hello Face Package
InternetExplorer Optional Package
KB5003791
KB5011048
KB5015684
KB5033052
LanguageFeatures Basic en us Package
LanguageFeatures Handwriting en us Package
LanguageFeatures OCR en us Package
LanguageFeatures Speech en us Package
LanguageFeatures TextToSpeech en us Package
MSPaint FoD Package
MediaPlayer Package
Microsoft OneCore ApplicationModel Sync Desktop FOD Package
Microsoft OneCore DirectX Database FOD Package
NetFx3 OnDemand Package
Notepad FoD Package
OpenSSH Client Package
PowerShell ISE FOD Package
Printing PMCPPC FoD Package
Printing WFS FoD Package
ProfessionalEdition
QuickAssist Package
RollupFix
ServicingStack
ServicingStack 3989
StepsRecorder Package
TabletPCMath Package
UserExperience Desktop Package
WordPad FoD Package

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MALICIOUS
- Actions looks like stealing of personal data
  - SumatraPDF-3.5.2-64.exe (PID: 1148)
SUSPICIOUS
- Reads security settings of Internet Explorer
  - PDFixers.exe (PID: 5092)
  - SumatraPDF-3.5.2-64.exe (PID: 1148)
- Reads Internet Explorer settings
  - PDFixers.exe (PID: 5092)
- Reads Microsoft Outlook installation path
  - PDFixers.exe (PID: 5092)
- Checks Windows Trust Settings
  - PDFixers.exe (PID: 5092)
- Executable content was dropped or overwritten
  - PDFixers.exe (PID: 5092)
- Creates a software uninstall entry
  - PDFixers.exe (PID: 5092)
- Searches for installed software
  - PDFixers.exe (PID: 5092)
- Reads the date of Windows installation
  - PDFixers.exe (PID: 5092)
INFO
- Checks supported languages
  - PDFixers.exe (PID: 5092)
  - SumatraPDF-3.5.2-64.exe (PID: 1148)
- Reads the computer name
  - PDFixers.exe (PID: 5092)
  - SumatraPDF-3.5.2-64.exe (PID: 1148)
- Creates files or folders in the user directory
  - PDFixers.exe (PID: 5092)
  - SumatraPDF-3.5.2-64.exe (PID: 1148)
- Checks proxy server information
  - PDFixers.exe (PID: 5092)
- Reads the machine GUID from the registry
  - PDFixers.exe (PID: 5092)
- Process checks computer location settings
  - PDFixers.exe (PID: 5092)
- Reads the software policy settings
  - PDFixers.exe (PID: 5092)
- The process uses the downloaded file
  - PDFixers.exe (PID: 5092)
- Reads CPU info
  - SumatraPDF-3.5.2-64.exe (PID: 1148)

Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

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No Malware configuration.

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TRiD

.exe	\|	Generic Win/DOS Executable (50)
.exe	\|	DOS Executable Generic (49.9)

EXIF

EXE

MachineType:	AMD AMD64
TimeStamp:	2054:11:16 06:26:21+00:00
ImageFileCharacteristics:	Executable, Large address aware
PEType:	PE32+
LinkerVersion:	80
CodeSize:	8382976
InitializedDataSize:	112128
UninitializedDataSize:	-
EntryPoint:	0x0000
OSVersion:	4
ImageVersion:	-
SubsystemVersion:	6
Subsystem:	Windows GUI
FileVersionNumber:	1.0.0.0
ProductVersionNumber:	1.0.0.0
FileFlagsMask:	0x003f
FileFlags:	(none)
FileOS:	Win32
ObjectFileType:	Executable application
FileSubtype:	-
LanguageCode:	Neutral
CharacterSet:	Unicode
Comments:	-
CompanyName:	-
FileDescription:	Pdfixers
FileVersion:	1.0.0.0
InternalName:	Pdfixers.exe
LegalCopyright:	Copyright © 2023
LegalTrademarks:	-
OriginalFileName:	Pdfixers.exe
ProductName:	Pdfixers
ProductVersion:	1.0.0.0
AssemblyVersion:	1.0.0.0

No data.

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All screenshots are available in the full report

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Total processes

121

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

1148

"C:\Users\admin\AppData\Roaming\SumatraPDF\SumatraPDF-3.5.2-64.exe"

C:\Users\admin\AppData\Roaming\SumatraPDF\SumatraPDF-3.5.2-64.exe

PDFixers.exe

User:

admin

Company:

Krzysztof Kowalczyk

Integrity Level:

MEDIUM

Description:

SumatraPDF

Version:

3.5.2

Modules

Images
c:\users\admin\appdata\roaming\sumatrapdf\sumatrapdf-3.5.2-64.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\windows\system32\user32.dll
c:\windows\system32\win32u.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\gdi32full.dll
c:\windows\winsxs\amd64_microsoft.windows.common-controls_6595b64144ccf1df_6.0.19041.3636_none_60b6a03d71f818d5\comctl32.dll

5092

"C:\Users\admin\AppData\Local\Temp\PDFixers.exe"

C:\Users\admin\AppData\Local\Temp\PDFixers.exe

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Description:

Pdfixers

Version:

1.0.0.0

Modules

Images
c:\users\admin\appdata\local\temp\pdfixers.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\mscoree.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll

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Total events

7 381

Read events

7 247

Write events

128

Delete events

Modification events


(PID) Process:	(5092) PDFixers.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content
Operation:	write	Name:	CachePrefix
Value:
(PID) Process:	(5092) PDFixers.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies
Operation:	write	Name:	CachePrefix
Value: Cookie:
(PID) Process:	(5092) PDFixers.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History
Operation:	write	Name:	CachePrefix
Value: Visited:
(PID) Process:	(5092) PDFixers.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\SumatraPDFUninstall
Operation:	write	Name:	DisplayName
Value: SumatraPDF
(PID) Process:	(5092) PDFixers.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\SumatraPDFUninstall
Operation:	write	Name:	UninstallString
Value: cmd /c rmdir /s /q "C:\Users\admin\AppData\Roaming\SumatraPDF" & del "C:\Users\admin\Desktop\SumatraPDF.lnk" & reg delete HKCU\Software\Microsoft\Windows\CurrentVersion\Uninstall\SumatraPDFUninstall /f
(PID) Process:	(1148) SumatraPDF-3.5.2-64.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\Shell\BagMRU
Operation:	write	Name:	NodeSlots
Value: 020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202020202
(PID) Process:	(1148) SumatraPDF-3.5.2-64.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\Shell\BagMRU
Operation:	write	Name:	MRUListEx
Value: 0400000000000000030000000E0000000F0000000C0000000D0000000B000000050000000A000000090000000800000001000000070000000600000002000000FFFFFFFF
(PID) Process:	(1148) SumatraPDF-3.5.2-64.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\4
Operation:	write	Name:	MRUListEx
Value: 040000000000000005000000020000000100000003000000FFFFFFFF
(PID) Process:	(1148) SumatraPDF-3.5.2-64.exe	Key:	HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\Shell\Bags\119\Shell
Operation:	write	Name:	SniffedFolderType
Value: Documents
(PID) Process:	(1148) SumatraPDF-3.5.2-64.exe	Key:	HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
Operation:	write	Name:	GlobalAssocChangedCounter
Value: 93

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
5092	PDFixers.exe	C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B46811C17859FFB409CF0E904A4AA8F8		der
		MD5:971C514F84BBA0785F80AA1C23EDFD79	SHA256:F157ED17FCAF8837FA82F8B69973848C9B10A02636848F995698212A08F31895
5092	PDFixers.exe	C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B46811C17859FFB409CF0E904A4AA8F8		binary
		MD5:E1C7DEB8C345E0D8B31B34A5CE9F411F	SHA256:E3D2CA7A042800FFA2E4515B6E961BE121D97B303606E3BF34D757022DED47B6
5092	PDFixers.exe	C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8B2B9A00839EED1DFDCCC3BFC2F5DF12		der
		MD5:7FB5FA1534DCF77F2125B2403B30A0EE	SHA256:33A39E9EC2133230533A686EC43760026E014A3828C703707ACBC150FE40FD6F
5092	PDFixers.exe	C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\C02877841121CC45139CB51404116B25_193C88518F770D3F8D3CDA4F180E8635		der
		MD5:829E1EB92538358064094BC043553FD9	SHA256:8F8ECD7F65AAA5F1C2A719641B0DED075CBBB1ED30E42934585BF5C4623B7B0C
5092	PDFixers.exe	C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8B2B9A00839EED1DFDCCC3BFC2F5DF12		binary
		MD5:9473F8887CCC4430F9757FE8C8EF9C4D	SHA256:947FF17B20CC9906C1AD675337187E648008B33FC5F874E97833C0672475AE45
5092	PDFixers.exe	C:\Users\admin\AppData\Local\Microsoft\Windows\INetCache\IE\RR3E01RZ\font[1].eot		eot
		MD5:C6B85601ADBF8C674B4B444DAD696A5D	SHA256:EC8671B432FF49E1E77F48692397E57ECFA584555AC664C932DCCEA0C9A16044
5092	PDFixers.exe	C:\Users\admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\05DDC6AA91765AACACDB0A5F96DF8199		binary
		MD5:C552D260D69C4E26CE596DF8C49AD5A8	SHA256:08FA8C866FB4E26400F1A9267B9C26D089DCBCFBB548C8931E0C560D63C3E96E
5092	PDFixers.exe	C:\Users\admin\AppData\Local\Microsoft\Windows\INetCache\IE\RR3E01RZ\3QK3NOS6.htm		html
		MD5:0167B2F7551DB151D851ECD9AA96BF56	SHA256:E27C1FAE095C1CF4186A201A5407788582040F075CF40BBCFAB1CE1EFCE7EB59
5092	PDFixers.exe	C:\Users\admin\Desktop\SumatraPDF.lnk		binary
		MD5:FD841360222851F8C76C8F5D9E1ADFAE	SHA256:C55B45E9BBA0F6CDCE6F994479FF11195403AB5E26579FE1613256991FEA6664
1148	SumatraPDF-3.5.2-64.exe	C:\Users\admin\AppData\Roaming\SumatraPDF\SumatraPDF-settings.txt		text
		MD5:C67234D014F4BDE63E124E35B00E0312	SHA256:90C8D6C38F610D584F28337A6399B9932C96CAE958C575BA05063B2CCE5E2C97

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

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HTTP(S) requests

TCP/UDP connections

DNS requests

Threats

HTTP requests

PID	Process	Method	HTTP Code	IP	URL	CN	Type	Size	Reputation
2120	MoUsoCoreWorker.exe	GET	200	88.221.169.152:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
6056	svchost.exe	GET	200	88.221.169.152:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
5092	PDFixers.exe	GET	200	142.250.184.227:80	http://c.pki.goog/r/gsr1.crl	unknown	—	—	whitelisted
5092	PDFixers.exe	GET	200	142.250.184.227:80	http://c.pki.goog/r/r4.crl	unknown	—	—	whitelisted
5092	PDFixers.exe	GET	200	142.250.184.227:80	http://c.pki.goog/r/r1.crl	unknown	—	—	whitelisted
5092	PDFixers.exe	GET	200	142.250.185.163:80	http://o.pki.goog/wr2/MFIwUDBOMEwwSjAJBgUrDgMCGgUABBRTQtSEi8EX%2BbYUTXd8%2ByMxD3s1zQQU3hse7XkV1D43JMMhu%2Bw0OW1CsjACEQDBBI61buTJSxBPkvvajAV6	unknown	—	—	whitelisted
5092	PDFixers.exe	GET	200	142.250.185.163:80	http://o.pki.goog/wr2/MFEwTzBNMEswSTAJBgUrDgMCGgUABBRTQtSEi8EX%2BbYUTXd8%2ByMxD3s1zQQU3hse7XkV1D43JMMhu%2Bw0OW1CsjACEGs31zQSL0RFCna%2BsoPon%2Bg%3D	unknown	—	—	whitelisted
5140	SIHClient.exe	GET	200	23.35.229.160:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl	unknown	—	—	whitelisted
5140	SIHClient.exe	GET	200	23.35.229.160:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl	unknown	—	—	whitelisted

Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID	Process	IP	Domain	ASN	CN	Reputation
4	System	192.168.100.255:138	—	—	—	whitelisted
—	—	4.231.128.59:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
2120	MoUsoCoreWorker.exe	88.221.169.152:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted
6056	svchost.exe	88.221.169.152:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted
3888	svchost.exe	239.255.255.250:1900	—	—	—	whitelisted
6056	svchost.exe	4.231.128.59:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
5092	PDFixers.exe	172.67.147.142:443	pixel.pdfixers.com	CLOUDFLARENET	US	unknown
5092	PDFixers.exe	142.250.184.227:80	c.pki.goog	GOOGLE	US	whitelisted
5092	PDFixers.exe	142.250.185.202:443	fonts.googleapis.com	GOOGLE	US	whitelisted
5092	PDFixers.exe	142.250.185.163:80	o.pki.goog	GOOGLE	US	whitelisted

DNS requests

Domain	IP	Reputation
settings-win.data.microsoft.com	4.231.128.59	whitelisted
www.microsoft.com	88.221.169.152 23.35.229.160	whitelisted
google.com	142.250.181.238	whitelisted
pixel.pdfixers.com	172.67.147.142 104.21.11.17	unknown
c.pki.goog	142.250.184.227	whitelisted
fonts.googleapis.com	142.250.185.202	whitelisted
o.pki.goog	142.250.185.163	whitelisted
fonts.gstatic.com	172.217.16.195	whitelisted
client.wns.windows.com	40.113.110.67	whitelisted
slscr.update.microsoft.com	13.85.23.86	whitelisted

Threats

No threats detected

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No debug info

General Info

PDFixers.exe

B4440EEA7367C3FB04A89225DF4022A6

5A6C01F821F10F6ED1F1283ECBA36C5BACFB5838

A024A18E27707738ADCD7B5A740C5A93534B4B8C9D3B947F6D85740AF19D17D0

98304:NKaPGf3Lx51clR43g0ZtKC5/TF4i9bYvQCPjhPXq2fZWwZmchG6QjvOr/av7Vx6U:Lm3qrzPw0jtrQp

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

Actions looks like stealing of personal data

SUSPICIOUS

Reads security settings of Internet Explorer

Reads Internet Explorer settings

Reads Microsoft Outlook installation path

Checks Windows Trust Settings

Executable content was dropped or overwritten

Creates a software uninstall entry

Searches for installed software

Reads the date of Windows installation

INFO

Checks supported languages

Reads the computer name

Creates files or folders in the user directory

Checks proxy server information

Reads the machine GUID from the registry

Process checks computer location settings

Reads the software policy settings

The process uses the downloaded file

Reads CPU info

Malware configuration

Static information

TRiD

EXIF

EXE

Video and screenshots

Processes

Behavior graph

Specs description

Process information

Information

Modules

Information

Modules

Registry activity

Modification events

Files activity

Dropped files

Network activity

HTTP requests

Connections

DNS requests

Threats

Debug output strings