Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95b6d2f74819c5b…

MALICIOUS

PDF

54.8 KB Created: 2009-09-02 02:27:58 Authoring application: Scribus 1.3.3.13 (via Scribus PDF Library 1.3.3.13)
MD5: a3f9c3c7a8d8df8844eaceb3bb72668f SHA-1: 90c975b1e420e21324da79ce2ce3e3c6de8b53f5 SHA-256: f95b6d2f74819c5bc0c90c5d876423715ce6f4bf150fe42ee480ed5bc9a0a0dc
108 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a dropper. The presence of multiple embedded JavaScript streams indicates an attempt to execute code. While the JavaScript content is not directly visible in the provided evidence, the heuristics and ClamAV detection strongly suggest that this PDF is designed to download and execute a secondary malicious payload. The PDF structure itself does not contain user-readable content, relying on its embedded scripts for malicious functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9200

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7326319-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7326319-0
  • 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.
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0058_000.js
db1d5dc8fa34e1ed380b514bc2964b83b8a174c24f955dc159b68243001b85ea		 pdf-javascript-stream PDF /JS object 58 at offset 0x9977 23767 bytes
javascript_obj0059_001.js
6999885f0ee23a9ff63130343fa50b09346a37ba4b4e78462859626456d252ed		 pdf-javascript-stream PDF /JS object 59 at offset 0xD01F 223 bytes
javascript_obj0060_002.js
0474d36fe33239f75afbaa2e3e2d64c54cb7335e7a9a8102f6da764af99c571c		 pdf-javascript-stream PDF /JS object 60 at offset 0xD11E 163 bytes
javascript_obj0061_003.js
1c064c41e97631ffc3893429b256ae7d80faa5368ef1c03934efded7cb989266		 pdf-javascript-stream PDF /JS object 61 at offset 0xD1ED 183 bytes
javascript_obj0062_004.js
6c78e949bfae4420dd2d03dbdb3d62ff119538cce5213d6c880fe6823f34fdec		 pdf-javascript-stream PDF /JS object 62 at offset 0xD2B7 221 bytes

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