File name:

pdfskills.exe

Full analysis: https://app.any.run/tasks/438d666b-0e93-4dc1-bc1e-9f7b85f43c89
Verdict: Malicious activity
Analysis date: May 25, 2025, 17:34:52
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.
  • MALICIOUS

    • GENERIC has been found (auto)

      • pdfskills.exe (PID: 3900)
  • SUSPICIOUS

    • Reads security settings of Internet Explorer

      • pdfskills.exe (PID: 3900)
      • PDFSkillsApp.exe (PID: 7048)
      • PDFSkillsApp.exe (PID: 872)
    • Executable content was dropped or overwritten

      • pdfskills.exe (PID: 3900)
    • Searches for installed software

      • pdfskills.exe (PID: 3900)
    • Creates a software uninstall entry

      • pdfskills.exe (PID: 3900)
    • Reads the date of Windows installation

      • pdfskills.exe (PID: 3900)
  • INFO

    • Reads the computer name

      • pdfskills.exe (PID: 3900)
      • PDFSkillsApp.exe (PID: 872)
      • PDFSkillsApp.exe (PID: 7048)
    • Reads the machine GUID from the registry

      • pdfskills.exe (PID: 3900)
      • PDFSkillsApp.exe (PID: 872)
      • PDFSkillsApp.exe (PID: 7048)
    • Creates files or folders in the user directory

      • pdfskills.exe (PID: 3900)
    • Reads Environment values

      • pdfskills.exe (PID: 3900)
    • Checks supported languages

      • pdfskills.exe (PID: 3900)
      • PDFSkillsApp.exe (PID: 7048)
      • PDFSkillsApp.exe (PID: 872)
    • Disables trace logs

      • pdfskills.exe (PID: 3900)
    • Checks proxy server information

      • pdfskills.exe (PID: 3900)
    • Reads the software policy settings

      • pdfskills.exe (PID: 3900)
      • slui.exe (PID: 536)
    • Reads security settings of Internet Explorer

      • notepad.exe (PID: 4268)
    • Manual execution by a user

      • PDFSkillsApp.exe (PID: 872)
      • notepad.exe (PID: 4268)
    • Process checks computer location settings

      • pdfskills.exe (PID: 3900)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

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.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
139
Monitored processes
8
Malicious processes
1
Suspicious processes
0

Behavior graph

Click at the process to see the details
start pdfskills.exe sppextcomobj.exe no specs slui.exe pdfskillsapp.exe no specs rundll32.exe no specs notepad.exe no specs slui.exe pdfskillsapp.exe

Process information

PID
CMD
Path
Indicators
Parent process
536"C:\WINDOWS\System32\SLUI.exe" RuleId=3482d82e-ca2c-4e1f-8864-da0267b484b2;Action=AutoActivate;AppId=55c92734-d682-4d71-983e-d6ec3f16059f;SkuId=4de7cb65-cdf1-4de9-8ae8-e3cce27b9f2c;NotificationInterval=1440;Trigger=TimerEventC:\Windows\System32\slui.exe
SppExtComObj.Exe
User:
NETWORK SERVICE
Company:
Microsoft Corporation
Integrity Level:
SYSTEM
Description:
Windows Activation Client
Exit code:
1
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\slui.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\user32.dll
872"C:\Users\admin\AppData\Local\PDFSkills\PDFSkillsApp.exe" C:\Users\admin\AppData\Local\PDFSkills\PDFSkillsApp.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Description:
NativeTemplate
Exit code:
0
Version:
4.0.0.0
Modules
Images
c:\users\admin\appdata\local\pdfskills\pdfskillsapp.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
900C:\WINDOWS\system32\SppExtComObj.exe -EmbeddingC:\Windows\System32\SppExtComObj.Exesvchost.exe
User:
NETWORK SERVICE
Company:
Microsoft Corporation
Integrity Level:
SYSTEM
Description:
KMS Connection Broker
Exit code:
0
Version:
10.0.19041.3996 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\sppextcomobj.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\oleaut32.dll
1568C:\WINDOWS\System32\rundll32.exe C:\WINDOWS\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -EmbeddingC:\Windows\System32\rundll32.exesvchost.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows host process (Rundll32)
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\rundll32.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\shcore.dll
c:\windows\system32\imagehlp.dll
3900"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
Exit code:
0
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
4268"C:\WINDOWS\system32\NOTEPAD.EXE" C:\Users\admin\AppData\Local\PDFSkills\skillsUserId.txtC:\Windows\System32\notepad.exeexplorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Notepad
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\notepad.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\win32u.dll
c:\windows\system32\gdi32full.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\user32.dll
6744C:\WINDOWS\System32\slui.exe -EmbeddingC:\Windows\System32\slui.exe
svchost.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Activation Client
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\slui.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\user32.dll
7048"C:\Users\admin\AppData\Local\PDFSkills\PDFSkillsApp.exe" C:\Users\admin\AppData\Local\PDFSkills\PDFSkillsApp.exepdfskills.exe
User:
admin
Integrity Level:
MEDIUM
Description:
NativeTemplate
Exit code:
0
Version:
4.0.0.0
Modules
Images
c:\users\admin\appdata\local\pdfskills\pdfskillsapp.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
Total events
10 868
Read events
10 716
Write events
147
Delete events
5

Modification events

(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:writeName:EnableFileTracing
Value:
0
(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:writeName:EnableAutoFileTracing
Value:
0
(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:writeName:EnableConsoleTracing
Value:
0
(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:writeName:FileTracingMask
Value:
(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:writeName:ConsoleTracingMask
Value:
(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:writeName:MaxFileSize
Value:
1048576
(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASAPI32
Operation:writeName:FileDirectory
Value:
%windir%\tracing
(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASMANCS
Operation:writeName:EnableFileTracing
Value:
0
(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASMANCS
Operation:writeName:EnableAutoFileTracing
Value:
0
(PID) Process:(3900) pdfskills.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\pdfskills_RASMANCS
Operation:writeName:EnableConsoleTracing
Value:
0
Executable files
2
Suspicious files
1
Text files
3
Unknown types
0

Dropped files

PID
Process
Filename
Type
3900pdfskills.exeC:\Users\admin\AppData\Roaming\SMCR\userId.txttext
MD5:175D3155A3C7D2B6A1C3A805F4C4CC64
SHA256:D981E84D706F5F063243924F5DE83D90096C5F9B1F21EC892D8B652BA1B7EAD2
3900pdfskills.exeC:\Users\admin\AppData\Local\PDFSkills\skillsUserId.txttext
MD5:175D3155A3C7D2B6A1C3A805F4C4CC64
SHA256:D981E84D706F5F063243924F5DE83D90096C5F9B1F21EC892D8B652BA1B7EAD2
3900pdfskills.exeC:\Users\admin\AppData\Local\PDFSkills\PDFSkillsApp.exeexecutable
MD5:D625749A2AC95BE10D0BBC0B80053DAE
SHA256:666D8F132048755CC2951437D6E2F66795A3345A070BE15DD67098378E919F8A
3900pdfskills.exeC:\Users\admin\AppData\Local\PDFSkills\PDFSkills.Belongings.favicon.icoimage
MD5:FC5F48AAF4694FABB338180E78FCFDCB
SHA256:575233647D440DF001566E8092FD408E1F3C840BC3991A1866408AFDA3DC6F99
3900pdfskills.exeC:\Users\admin\Desktop\PDFSkillsApp.lnkbinary
MD5:B6013FE3CF2E29FC30939E80CA8071E6
SHA256:7894F7C621292769A0EF674C829B290CD4B95A282A28D1E7DE32C501D3D788F3
3900pdfskills.exeC:\Users\admin\AppData\Local\PDFSkills\Uninstall.exeexecutable
MD5:2368A9422D855316695A77C1140AEA2C
SHA256:E6696F2BE034E1D113FABEC1C3843704EE7CC88CE0624BBA3E942E32DD7E99C5
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
5
TCP/UDP connections
26
DNS requests
20
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
5496
MoUsoCoreWorker.exe
GET
200
23.216.77.38:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
whitelisted
5496
MoUsoCoreWorker.exe
GET
200
2.23.246.101:80
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
5968
SIHClient.exe
GET
200
2.23.246.101:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl
unknown
whitelisted
5968
SIHClient.exe
GET
200
2.23.246.101:80
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
192.168.100.255:137
whitelisted
5796
svchost.exe
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
4996
RUXIMICS.exe
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
5496
MoUsoCoreWorker.exe
23.216.77.38:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
5496
MoUsoCoreWorker.exe
2.23.246.101:80
www.microsoft.com
Ooredoo Q.S.C.
QA
whitelisted
3900
pdfskills.exe
198.71.59.132:443
val.skillcli.com
IONOS SE
US
unknown
4
System
192.168.100.255:138
whitelisted
6544
svchost.exe
40.126.31.2:443
login.live.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
6544
svchost.exe
2.17.190.73:80
ocsp.digicert.com
AKAMAI-AS
DE
whitelisted

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 51.104.136.2
  • 40.127.240.158
whitelisted
crl.microsoft.com
  • 23.216.77.38
  • 23.216.77.4
  • 23.216.77.19
  • 23.216.77.36
  • 23.216.77.39
  • 23.216.77.33
  • 23.216.77.26
  • 23.216.77.25
  • 23.216.77.30
whitelisted
www.microsoft.com
  • 2.23.246.101
whitelisted
google.com
  • 172.217.23.110
whitelisted
val.skillcli.com
  • 198.71.59.132
unknown
login.live.com
  • 40.126.31.2
  • 40.126.31.3
  • 20.190.159.4
  • 20.190.159.0
  • 20.190.159.75
  • 40.126.31.0
  • 40.126.31.129
  • 20.190.159.73
whitelisted
ocsp.digicert.com
  • 2.17.190.73
whitelisted
cbn.skillcli.com
  • 198.71.59.132
unknown
client.wns.windows.com
  • 172.211.123.249
whitelisted
slscr.update.microsoft.com
  • 4.245.163.56
whitelisted

Threats

No threats detected
No debug info