Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2646ad04bed87d2…

MALICIOUS

PDF

1.4 KB
MD5: a8df9df5f43b00298e0451297d1af18d SHA-1: 6cbb95c21b8b2c197993027d76cc0fb005f3a17c SHA-256: e2646ad04bed87d26159c588163c6d5f40291af362f9d128a016667a884f4f15
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2009_4324 firing suggests exploitation of a specific vulnerability related to media player objects. The unescape() call further points to obfuscated JavaScript. The primary intent appears to be the execution of this script, which is likely designed to download and execute a secondary payload, as suggested by the ClamAV detection name 'Pdf.Dropper.Agent'.

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-1829033 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1829033
  • 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
f2478e886359b1aebd2f7970861775ff80475f0817ba006f6670ab548332fa7e		 pdf-javascript-stream PDF /JS object 111111 at offset 0x160 1254 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
6845e1b4166c6059eab69721deeab21164751a6222621c0205c10d5efabec377		 pdf-javascript-stream PDF /JS object 111112 at offset 0x484 256 bytes

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