Malicious PDF — malware analysis report

Static analysis result for SHA-256 254d8e56fab85b05…

MALICIOUS

PDF

9.9 KB Created: 2010-06-06 12:38:58 Authoring application: Pwezicohibemadafi (via bd962Swasezoka)
MD5: 913d2f109b9c12e378922b08172e6e31 SHA-1: ffe67072d970da683668f6cd65e966e886b038d7 SHA-256: 254d8e56fab85b054409ad61c7a44096a6c95e38ff290639739cdfd3bdd98a5a
298 Risk Score

Malware Insights

MITRE ATT&CK
T1190 Exploit Public-Facing Application

The PDF file contains embedded JavaScript that is XOR-decoded and executed via the OpenAction trigger. Critical heuristics indicate exploitation of CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The deobfuscated JavaScript stream, named 'page_word_xor_stage_000.js', is likely responsible for downloading and executing a second-stage payload, although the exact URL or payload is not directly visible in 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_obj0017_000.js
dfaf0df11780b2f40266faa477fe5440b90e0d3d484dce0dd1abec0223b6c294		 pdf-javascript-stream PDF /JS object 17 at offset 0x19D2 4002 bytes
page_word_xor_stage_000.js
11237b14b2d926c1daa1be5764d141d4c89c61662ae20b931152c525001fe2dd		 deobfuscated-js page-word XOR decoded JavaScript (decompressed, key=0xEE) at offset 0x7D1 3028 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).

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