Malware analysis pdfskills.exe Malicious activity | ANY.RUN

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File name:	pdfskills.exe
Full analysis:	https://app.any.run/tasks/98a13aa2-9ac0-4a15-a894-6511e3247555
Verdict:	Malicious activity
Analysis date:	May 15, 2025, 19:17:16
OS:	Windows 10 Professional (build: 19044, 64 bit)
Tags:	auto generic
Indicators:
MIME:	application/vnd.microsoft.portable-executable
File info:	PE32+ executable (GUI) x86-64 Mono/.Net assembly, for MS Windows, 2 sections
MD5:	6993F5E370CA16EF520108FC8E24ECF5
SHA1:	6C90CAE62C6E4B5C7FBED2AC13252410AF0132BC
SHA256:	1994B6C8C30B4346F6B00DA12FC161EB73210AF08B914A1C4768B109B234F2DF
SSDEEP:	98304:Rw4DuwYxT2ZyydrgUleLSzW8vdj2iXrVfY1c75uzdFhb4PyH1ZH30kMhvXHDnBXj:3KBRdnefCjO

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:: off
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
- GENERIC has been found (auto)
  - pdfskills.exe (PID: 300)
SUSPICIOUS
- Reads security settings of Internet Explorer
  - pdfskills.exe (PID: 300)
INFO
- Checks supported languages
  - pdfskills.exe (PID: 300)
- Disables trace logs
  - pdfskills.exe (PID: 300)
- Creates files or folders in the user directory
  - pdfskills.exe (PID: 300)
- Reads the computer name
  - pdfskills.exe (PID: 300)
- Reads Environment values
  - pdfskills.exe (PID: 300)
- Checks proxy server information
  - pdfskills.exe (PID: 300)
- Reads the machine GUID from the registry
  - pdfskills.exe (PID: 300)
- Reads the software policy settings
  - pdfskills.exe (PID: 300)

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	\|	Win64 Executable (generic) (87.3)
.exe	\|	Generic Win/DOS Executable (6.3)
.exe	\|	DOS Executable Generic (6.3)

EXIF

EXE

MachineType:	AMD AMD64
TimeStamp:	2074:07:23 17:41:10+00:00
ImageFileCharacteristics:	Executable, Large address aware
PEType:	PE32+
LinkerVersion:	48
CodeSize:	4860928
InitializedDataSize:	17408
UninitializedDataSize:	-
EntryPoint:	0x0000
OSVersion:	4
ImageVersion:	-
SubsystemVersion:	6
Subsystem:	Windows GUI
FileVersionNumber:	247.8.44.101
ProductVersionNumber:	247.8.44.101
FileFlagsMask:	0x003f
FileFlags:	(none)
FileOS:	Win32
ObjectFileType:	Executable application
FileSubtype:	-
LanguageCode:	Neutral
CharacterSet:	Unicode
Comments:	-
CompanyName:	-
FileDescription:	PDFSkills
FileVersion:	247.8.44.101
InternalName:	PDFSkills.exe
LegalCopyright:	Copyright © 2015-2023 BLACK INDIGO All rights reserved
LegalTrademarks:	-
OriginalFileName:	PDFSkills.exe
ProductName:	PDFSkills
ProductVersion:	247.8.44.101
AssemblyVersion:	247.8.44.101

No data.

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All screenshots are available in the full report

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Total processes

130

Monitored processes

Malicious processes

Suspicious processes

Behavior graph

Click at the process to see the details

Process information

PID

CMD

Path

Indicators

Parent process

300

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

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

explorer.exe

User:

admin

Integrity Level:

MEDIUM

Description:

PDFSkills

Version:

247.8.44.101

Modules

Images
c:\users\admin\appdata\local\temp\pdfskills.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

1 534

Read events

1 520

Write events

Delete events

Modification events


(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:	write	Name:	EnableFileTracing
Value: 0
(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:	write	Name:	EnableAutoFileTracing
Value: 0
(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:	write	Name:	EnableConsoleTracing
Value: 0
(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:	write	Name:	FileTracingMask
Value:
(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:	write	Name:	ConsoleTracingMask
Value:
(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:	write	Name:	MaxFileSize
Value: 1048576
(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:	write	Name:	FileDirectory
Value: %windir%\tracing
(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASMANCS
Operation:	write	Name:	EnableFileTracing
Value: 0
(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASMANCS
Operation:	write	Name:	EnableAutoFileTracing
Value: 0
(PID) Process:	(300) pdfskills.exe	Key:	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASMANCS
Operation:	write	Name:	EnableConsoleTracing
Value: 0

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Executable files

Suspicious files

Text files

Unknown types

Dropped files

PID	Process	Filename		Type
300	pdfskills.exe	C:\Users\admin\AppData\Local\PDFSkills\skillsUserId.txt		text
		MD5:8917AB59E452FAFE7CFC21BAF4F2FED8	SHA256:979EDAB31D9E547D01F323AC0478B63DB904FE87DAF9D0FDB7957EF560CDEF1E
300	pdfskills.exe	C:\Users\admin\AppData\Roaming\SMCR\userId.txt		text
		MD5:8917AB59E452FAFE7CFC21BAF4F2FED8	SHA256:979EDAB31D9E547D01F323AC0478B63DB904FE87DAF9D0FDB7957EF560CDEF1E

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
5496	MoUsoCoreWorker.exe	GET	200	23.48.23.161:80	http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl	unknown	—	—	whitelisted
5496	MoUsoCoreWorker.exe	GET	200	69.192.161.161:80	http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl	unknown	—	—	whitelisted
6544	svchost.exe	GET	200	2.17.190.73:80	http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D	unknown	—	—	whitelisted
3884	SIHClient.exe	GET	200	69.192.161.161:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl	unknown	—	—	whitelisted
3884	SIHClient.exe	GET	200	69.192.161.161:80	http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.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	192.168.100.255:137	—	—	—	whitelisted
—	—	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted
5496	MoUsoCoreWorker.exe	23.48.23.161:80	crl.microsoft.com	Akamai International B.V.	DE	whitelisted
5496	MoUsoCoreWorker.exe	69.192.161.161:80	www.microsoft.com	AKAMAI-AS	DE	whitelisted
4	System	192.168.100.255:138	—	—	—	whitelisted
3216	svchost.exe	172.211.123.249:443	client.wns.windows.com	MICROSOFT-CORP-MSN-AS-BLOCK	FR	whitelisted
300	pdfskills.exe	198.71.59.132:443	val.skillcli.com	IONOS SE	US	unknown
6544	svchost.exe	20.190.160.65:443	login.live.com	MICROSOFT-CORP-MSN-AS-BLOCK	NL	whitelisted
6544	svchost.exe	2.17.190.73:80	ocsp.digicert.com	AKAMAI-AS	DE	whitelisted
2104	svchost.exe	51.104.136.2:443	settings-win.data.microsoft.com	MICROSOFT-CORP-MSN-AS-BLOCK	IE	whitelisted

DNS requests

Domain	IP	Reputation
google.com	216.58.206.78	whitelisted
settings-win.data.microsoft.com	51.104.136.2	whitelisted
crl.microsoft.com	23.48.23.161 23.48.23.183 23.48.23.181 23.48.23.162 23.48.23.164 23.48.23.185 23.48.23.169 23.48.23.174 23.48.23.159	whitelisted
www.microsoft.com	69.192.161.161	whitelisted
client.wns.windows.com	172.211.123.249	whitelisted
val.skillcli.com	198.71.59.132	unknown
login.live.com	20.190.160.65 40.126.32.140 20.190.160.128 20.190.160.5 40.126.32.74 20.190.160.130 20.190.160.64 40.126.32.134	whitelisted
ocsp.digicert.com	2.17.190.73	whitelisted
slscr.update.microsoft.com	52.149.20.212	whitelisted
fe3cr.delivery.mp.microsoft.com	20.3.187.198	whitelisted

Threats

No threats detected

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No debug info

General Info

pdfskills.exe

6993F5E370CA16EF520108FC8E24ECF5

6C90CAE62C6E4B5C7FBED2AC13252410AF0132BC

1994B6C8C30B4346F6B00DA12FC161EB73210AF08B914A1C4768B109B234F2DF

98304:Rw4DuwYxT2ZyydrgUleLSzW8vdj2iXrVfY1c75uzdFhb4PyH1ZH30kMhvXHDnBXj:3KBRdnefCjO

Software environment set and analysis options

Launch configuration

Software preset

Hotfixes

Behavior activities

MALICIOUS

GENERIC has been found (auto)

SUSPICIOUS

Reads security settings of Internet Explorer

INFO

Checks supported languages

Disables trace logs

Creates files or folders in the user directory

Reads the computer name

Reads Environment values

Checks proxy server information

Reads the machine GUID from the registry

Reads the software policy settings

Malware configuration

Static information

TRiD

EXIF

EXE

Video and screenshots

Processes

Behavior graph

Specs description

Process information

Information

Modules

Registry activity

Modification events

Files activity

Dropped files

Network activity

HTTP requests

Connections

DNS requests

Threats

Debug output strings