Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a76c962dc7d6a1…

MALICIOUS

PDF

1.4 KB
MD5: 31cbd09843bc709030325a80487a177a SHA-1: 0be2d4866deddb5b8bd0cf6607b501511ae4fbee SHA-256: e8a76c962dc7d6a1c08692c54e71e3db109c5fb94b8ce726de4316a0ffe73477
178 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identifies the CVE-2009-4324 vulnerability related to media.newPlayer, suggesting exploitation. The ClamAV detection of 'Pdf.Dropper.Agent-7318603-0' further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common dropper behavior.

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-7318603-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7318603-0
  • 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
0b7c787db193155e20854d16fe1a40d87502e1fec2b02542215b62b0b0a6e0d8		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1256 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
9e23864dad356831e3d74883efc2f296bdb1ebac1c966fc2ca73e8dd13de8953		 pdf-javascript-stream PDF /JS object 111112 at offset 0x484 262 bytes

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