Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83b33c7220f479c…

MALICIOUS

PDF

3.2 KB
MD5: a4ac0cc94f32d1c4bbcf4288a434e713 SHA-1: 1ecf0208fdb9d21c290eee7f7b4d9db2bb59a6fa SHA-256: f83b33c7220f479ccde4cbab1b75afefda7dde165e36a1d3e3c9920f422ce4c1
76 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV also detected this file as Pdf.Exploit.Agent-36121. The embedded JavaScript stream is the primary mechanism for exploitation, likely leading to the download and execution of a second-stage payload. However, the specific actions of the JavaScript could not be fully determined due to obfuscation or truncation.

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
40ff578a2141ec189061cf9f1d5645015cb02604b9c0288d49c035de97487227		 pdf-javascript-stream PDF /JS object 7 at offset 0x9C4 455 bytes

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