Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb77412cfeeeab2…

MALICIOUS

PDF

1.4 KB
MD5: 2a640faa473430353e537c0ff163163f SHA-1: 007b846b3e0eae59ba043b8c91fa3a0a6f17d6cd SHA-256: 4cb77412cfeeeab2ff7a14aabbf2f51505db0063802c32f8977877fe069c7ed0
180 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.007 JavaScript

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2009-4324, indicating it exploits a vulnerability in the media player functionality. The presence of JavaScript streams and the ClamAV detection as 'Pdf.Dropper.Agent' strongly suggest this PDF is a dropper designed to download and execute further malicious content. The unescape() call and obfuscation indicators in the embedded JavaScript further support this conclusion.

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-7212287-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7212287-0
  • 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
818a151aac84422b6bd1120a78c5f6ba2629e04ca073af4b3aeb5d2666e25299		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1264 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
7ccfaacc0f05b144cda226be320a5edc57e06dc737b40373b75460327fe049da		 pdf-javascript-stream PDF /JS object 111112 at offset 0x48D 255 bytes

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