Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c67e2b0ceabcb1d…

MALICIOUS

PDF

3.2 KB
MD5: 89a4301f3a378dbb6456cf4ceffc51e8 SHA-1: 459604354fd2d1cb67ba5fccde7c3cbbc4b14f62 SHA-256: 2c67e2b0ceabcb1df30ce7dc5484f5f77632ec4e151a288be3ed98791c6a4dcc
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. A critical heuristic, CVE_2009_4324, specifically points to the media.newPlayer vulnerability, suggesting the JavaScript is designed to exploit this flaw. The unescape() call further supports the presence of obfuscated JavaScript. The extracted JavaScript file, javascript_obj0006_000.js, is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

Heuristics 6

  • 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. (matched in decompressed stream)
  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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_obj0006_000.js
b040ff4c43108ea2bcb283a5ab17a963da4bd83741d8b1bb2a3d41a6c170aaca
pdf-javascript-stream PDF /JS object 6 at offset 0x1A7 2158 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).