Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad43f8dd3cca0cba…

MALICIOUS

PDF

9.2 KB Created: 2010-06-17 13:34:45 Authoring application: Meramafexaue (via 07fdcLerinolatarhe)
MD5: b7ea30c74024000b0bbda732df5910da SHA-1: 406126b4e04f0b93d2b037d8b23fa0b7bdb46deb SHA-256: ad43f8dd3cca0cba39fc5eef3e2e0ca83f0b955c516003c0aab94947bde983f2
298 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is XOR-decoded and executed via multiple known Adobe Reader vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992). The 'OpenAction' trigger indicates that this script is intended to run automatically upon opening the document. The deobfuscated JavaScript likely serves as a dropper for further malicious activity, though its exact function is not fully discernible from the provided evidence.

Heuristics 8

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
  • 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. (identified after JavaScript deobfuscation)
  • 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. (identified after JavaScript deobfuscation)
  • 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. (identified after JavaScript deobfuscation)
  • OpenAction trigger high PDF_OPENACTION
    PDF has an /OpenAction — code runs automatically when opened
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0015_000.js
30ab7e5d2093f6a8d91125ab8963eb699aef7bc8b2433b9c0a5bc2d83f8bb7b7		 pdf-javascript-stream PDF /JS object 15 at offset 0x170B 3966 bytes
page_word_xor_stage_000.js
8791caee3d32792d41fa0aa4fd3c6623f622ea4e3963c5b4d710e61f3a0bc69e		 deobfuscated-js page-word XOR decoded JavaScript (decompressed, key=0x88) at offset 0x413 3326 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).

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