Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1739596695ae86…

MALICIOUS

PDF

7.7 KB Created: 2011-01-30 12:35:38 Authoring application: XIORJqpv (via M1GaAjzdE0X)
MD5: cfb091485f8ef4ea7c78603be5b6f51b SHA-1: b33cc1916317c468d6abf902667f899e3c8b9e82 SHA-256: bc1739596695ae860360f2c14e3bfcd7b72e8129e444dd9b093e81987c76b3a4
338 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/Shell: PowerShell T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-0927 (Collab.getIcon), CVE-2007-5659 (Collab.collectEmailInfo), and CVE-2008-2992 (util.printf). These vulnerabilities are often chained to execute embedded JavaScript. The presence of an embedded JavaScript stream and a PDF OpenAction trigger further supports this. The JavaScript is likely designed to download and execute a secondary payload, as indicated by the 'Suspicious extracted artifact' heuristic.

Heuristics 9

  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (matched in decompressed stream)
  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
  • util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992
    PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
  • ClamAV: Pdf.Exploit.CVE_2009_0927-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.CVE_2009_0927-1
  • OpenAction trigger high PDF_OPENACTION
    PDF has an /OpenAction — code runs automatically when opened
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
46f57563a3863c0b980e6836c749fccee0c310d44d4dc0772cd0ac1d7ff5a35e		 pdf-javascript-stream PDF /JS object 7 at offset 0x23D 6616 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 7 eval/decoder/string-building token(s).

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