Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39cf396bd9a84fd…

MALICIOUS

PDF

37.3 KB Created: 2010-02-25 23:25:46 +03:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))
MD5: 258f09ff22c33e63b89c0d46a926c9b1 SHA-1: b41d4a68d980dcb9b2a7bb751c05ef751a6b4623 SHA-256: d39cf396bd9a84fd48ed837d8d46ae71f973d1b9965879eefda5a97c2cb11d1f
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings and the presence of a javascript_obj0010_000.js artifact. The ClamAV detection 'Pdf.Exploit.Agent-13868' strongly suggests this JavaScript is malicious, likely exploiting a vulnerability within the PDF reader to execute arbitrary code. The exact nature of the exploit and its payload cannot be determined without further analysis of the obfuscated JavaScript.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-13868 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-13868
  • 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.
  • Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT
    Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0010_000.js
f682b0382ed5a749fb62e7b245007a2317d65483e4517b4de3039c64c3d7c331		 pdf-javascript-stream PDF /JS object 10 at offset 0x705F 8126 bytes

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