Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c2b08087800d42…

MALICIOUS

PDF

45.0 KB
MD5: 65a3ebe71ac49029017aefb0f3a0b780 SHA-1: 165f7b6f0993e36bd567cf6813450029562add81 SHA-256: 51c2b08087800d4230a2a3aeb03b52318aed1982fbe1fb05072e9a148c2bcd05
76 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. ClamAV also detected it as 'Pdf.Exploit.Agent-36128'. The presence of obfuscated JavaScript suggests an attempt to execute malicious code, likely exploiting a PDF vulnerability to achieve this. The exact payload and execution flow are obscured by the obfuscation, but the intent is clearly malicious.

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
a33c1eed514efdf9ac0be9a132cc6c69eb94b2e69a3248c92775ee7a15a05cc8		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 45305 bytes
legacy_pdfkit_stage_000.js
e07b4fd1ba7012432f73ef7d65c64161d9550e5e9efaac1ce8fd54dcc19a9339		 deobfuscated-js double percent-decoded annotation JavaScript at offset 0x1E7 33047 bytes

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