Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8cc5fb841952aa…

MALICIOUS

PDF

3.6 KB
MD5: 1f37d1e69d56372007ab68afcc87366f SHA-1: c58af8985e556074527f6f2a10dee7aa54bdd769 SHA-256: 1c8cc5fb841952aaa4142180301a795adf26d02f3b9ecb8dcd49137ef4924a5b
178 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability via the media.newPlayer object. The JavaScript is obfuscated but the presence of unescape() calls and the ClamAV signature 'Pdf.Dropper.Agent-7236068-0' strongly indicate it's designed to download and execute a second-stage payload. The extracted artifact 'javascript_obj0006_000.js' further supports this analysis.

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: Pdf.Dropper.Agent-7236068-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7236068-0
  • 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
74dbdf237f8d0bbf5f1de58cf59fba6508a5281629499b7e263f689173e39788		 pdf-javascript-stream PDF /JS object 6 at offset 0x1B9 2552 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).

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