Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d929d30e676a43…

MALICIOUS

PDF

9.1 KB Created: 2010-06-13 18:55:53 Authoring application: Gbave ga (via 163f0Nikezenonageneenakvebi)
MD5: c9faac53b30e1cf52b66c5b7fed44964 SHA-1: 3e648930308efc5f5bb19f95494deabae4a27c79 SHA-256: e1d929d30e676a43d3796a3d1df64b47755c897b51dfa30c2b6a1dd280c867ae
298 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that is XOR-decoded and executed using multiple known CVE exploits (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992). The 'OpenAction' trigger further indicates that the script is intended to run automatically upon opening the PDF. The deobfuscated JavaScript likely serves as a loader for additional malicious content.

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
aa9c566278ad25a7bfd82182a1176cbb1dbe45be9de503aecc43706d48fd95a1		 pdf-javascript-stream PDF /JS object 15 at offset 0x16CF 4006 bytes
page_word_xor_stage_000.js
e2536ad16b76789555f47fd45cbb1a5d00cc205b32be3fc1d14c5a157b2f1e7d		 deobfuscated-js page-word XOR decoded JavaScript (decompressed, key=0x08) at offset 0x77C 3347 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).

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