Malicious PDF / .PHP — malware analysis report

Static analysis result for SHA-256 f37f425bb9467d89…

MALICIOUS

PDF / .PHP

37.8 KB Created: 2010-04-11 20:45:25 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))
MD5: e7c3e81157413d63ac8493f2fb628ddb SHA-1: 6626e6a968810f711408b81a13dcdfe72263395c SHA-256: f37f425bb9467d89f8db408e3752fc28576f872dfcdcf8abe9c58b669d75613f
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1559.001 Component Object Model

The file is identified as malicious by ClamAV (Pdf.Exploit.Agent-22613) and a machine learning classifier. Heuristics indicate the presence of embedded JavaScript within a PDF, specifically triggered by an Optional Content Group. This suggests the PDF is designed to exploit a vulnerability and execute malicious JavaScript code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-22613 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-22613
  • 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
74b7cbcdeab324cc7987272c172cb78d8208a909645f11e2e6dbf3d06f7f8148		 pdf-javascript-stream PDF /JS object 10 at offset 0x8CCC 1346 bytes

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