Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65e1efb54e9b247…

MALICIOUS

PDF

1.4 KB
MD5: e2e384af648bf704d2389f5c70041fef SHA-1: a70df8ecb299e0e2c9d13e7a10c57adc0986b378 SHA-256: f65e1efb54e9b247d8a1f2dce76c1cac8f45cf94d24a23db9f76058225c7f0f9
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious PDF T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2009_4324, specifically flags the use of media.newPlayer, a known exploit vector in older PDF versions. The presence of unescape() further suggests obfuscation of malicious JavaScript code. The ClamAV detection of 'Pdf.Dropper.Agent-7324726-0' strongly suggests this is a dropper designed to download and execute further malicious content.

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-7324726-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7324726-0
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj111111_000.js
7f4903668b1017e6f54cc1d171009257d8858853dc5901901335cbf5761fc40e		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1261 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
394b42f3149d037b68e1c6e860521d31c7db9ef20e494b261dd3f4c76a88fe15		 pdf-javascript-stream PDF /JS object 111112 at offset 0x488 277 bytes

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