Malicious PDF — malware analysis report

Static analysis result for SHA-256 af01800f61251f48…

MALICIOUS

PDF

81.3 KB Created: 2009-07-17 18:58:01 Authoring application: Scribus 1.3.3.13 (via Scribus PDF Library 1.3.3.13)
MD5: d0830d5146cd1d6942ea7ca94cf53d06 SHA-1: 254a5d51f0d7dd83f5fd6ab74b2c691bafbab56e SHA-256: af01800f61251f4877bca33ab9f5517a98a75b9af413ffdea71fd9ba27a0df63
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The file is identified as malicious by ClamAV and a machine learning classifier, specifically as a PDF dropper. Heuristics indicate the presence of embedded JavaScript, which is a common technique for delivering second-stage malware. The embedded JavaScript likely downloads and executes a malicious payload, contributing to the overall malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7293207-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7293207-0
  • 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 1 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0015_000.js
70e1cf42156b66dbe69e58418592160635ce67651c731caef6fe35e0e80d4bd5		 pdf-javascript-stream PDF /JS object 15 at offset 0x115FE 44570 bytes
javascript_obj0016_001.js
c905e789d688915a4a23e88bb55c89a88f60993637b8c31f9de6a11edf3415d4		 pdf-javascript-stream PDF /JS object 16 at offset 0x13F42 282 bytes
javascript_obj0017_002.js
6a382f0ef3efca9c633d6ff9d25eb45dada6afe6b294c5bf0e7a5d5cc3e92881		 pdf-javascript-stream PDF /JS object 17 at offset 0x14065 281 bytes

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