PDF malware analysis — malicious · 328d8b1e0b408aba

MALICIOUS

PDF

259.7 KB Created: 2009-08-30 00:20:17 UTC Authoring application: AdobePS5.dll Version 5.2.2 (via Mac OS X 10.5.8 Quartz PDFContext)

MD5: 07818af0771f2adc52d2da46d19132a1 SHA-1: 61ed91011dcb463e6bc00a1d2402d7f708d9e245 SHA-256: 328d8b1e0b408ababd234e16dccdb01c6a6099d7531787345d73413b4aa0d3b7

324 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a critical heuristic firing for PDF_LAUNCH_COMMAND indicates that cmd.exe is launched with specific parameters. This is further supported by the CVE_2010_1240 detection, which points to an exploit chain involving a launch action and an embedded executable payload. The embedded executable payload is decompressed from a PDF stream. The likely intent is to exploit a vulnerability to execute the embedded payload.

Heuristics 8

Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240

PDF uses the Adobe Reader/Acrobat Launch action pattern associated with CVE-2010-1240: cmd.exe is invoked with attacker-controlled parameters, paired with an embedded/exported payload.
Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD

PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
/Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND

PDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\form.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0022_000.js` `eff4a0943aaff2d99cb5c8666337775c91d4d5f687782df94d2c5fc77becde7f`	pdf-javascript-stream	PDF /JS object 22 at offset 0x40B08	53 bytes
`stream_003_off00003ba1.bin` `48eed816b82305f0aed08ec2e24dfa58c17876b4785e9f4c831582293afca43a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3BA1	454656 bytes
`icc_00_off000002d6.icc` `2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e`	pdf-icc-profile	PDF ICC profile at offset 0x2D6	3144 bytes

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