Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8359071e49a003a…

MALICIOUS

PDF

1.4 KB
MD5: ef27a6066bd469836ed09609952f14dd SHA-1: 925af66dec12de8b1c3c9d772d46cf9079ae38c1 SHA-256: c8359071e49a003a8a322cd331481cdeb20f195947bfeea237c42c77365ecb37
118 Risk Score

Malware Insights

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

The PDF document contains embedded JavaScript, which is triggered by the media.newPlayer action, indicating exploitation of CVE-2009-4324. The JavaScript is obfuscated and uses unescape() for decoding, suggesting it's designed to download and execute a second-stage payload. The presence of multiple JavaScript streams and the critical heuristic firing for CVE-2009-4324 strongly indicate a malicious PDF dropper.

Heuristics 5

  • 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)
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj111111_000.js
fc470ef6da5fa97c79e8fa2d403b6a67b7b322b31d662f112ece5f8ab79db552		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1253 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
javascript_obj111112_001.js
d6ffd0f570b262a95b10a078ad5a38fa2c3b49a5e0dc779ce1865a420f3f00c6		 pdf-javascript-stream PDF /JS object 111112 at offset 0x486 252 bytes

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