Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28d6e528a479765…

MALICIOUS

PDF

3.3 KB
MD5: 398c35933ff2cc9fccd2eea9ff738a0a SHA-1: 4127dac495dd263f5d05413de8133b600aeeb106 SHA-256: a28d6e528a479765eebf154473ce4c48b2924405bb67d204e4f05d17742f29a1
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF was flagged by ClamAV as Pdf.Exploit.Agent-36121 and a machine learning model assigned a high probability of maliciousness. Embedded JavaScript actions and streams were detected, indicating the potential for arbitrary code execution. The specific exploit used is not detailed, but the presence of JavaScript suggests an attempt to leverage PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
3977f6f609ecdc062092e8fb02fb0e67d4ba49057e3672d812a31b99c3b563ac		 pdf-javascript-stream PDF /JS object 7 at offset 0xA85 344 bytes

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