Malicious PDF — malware analysis report

Static analysis result for SHA-256 866b9c7c3d0bb8c6…

MALICIOUS

PDF

45.0 KB
MD5: 3a4c9d23efa2c87240682ff33f0a9484 SHA-1: f96380370012499ed02b174f5bc47e0ce5225286 SHA-256: 866b9c7c3d0bb8c6dccc29919a1b94100a3bbeb85b55b9550c0ffd31090e2f9c
76 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, indicated by multiple heuristic firings and the presence of extracted JS streams. ClamAV detection as 'Pdf.Exploit.Agent-36128' confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware delivery.

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36128 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36128
  • 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0008_000.js
929077aeebb0f928c9113449b1661ae0bf1a889dfd55680a868b3971b1d7bc55		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
c0c376d6a85e1ce5b9b2487011d7e66657d7a7e3441ca969a0456275b4a50df6		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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