Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddebc460d6fdbeac…

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: 03f0b779494b240df4b0b5ca909f909e SHA-1: 8030f1671642da452aee6d53fc9f43eb7f9b81fe SHA-256: ddebc460d6fdbeac7b8052d01ac3bd0b6c62db9b43eda4faa2b08005f1ebe5e2
108 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, flagged by multiple heuristics, and is identified by ClamAV as Pdf.Dropper.Agent-7313455-0. The ML classifier also strongly indicates maliciousness. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common dropper behavior. No specific family could be identified, but the dropper functionality is clear.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7313455-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7313455-0
  • 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
01c6d0e26be511a4ee45f7e7d1baffc159631b7cb68c851589fef7f3921e1b73		 pdf-javascript-stream PDF /JS object 15 at offset 0x115FE 44525 bytes
javascript_obj0016_001.js
271e34c19a3531d36ed010b6519656f263666af5b353570490c322ca3b10c20d		 pdf-javascript-stream PDF /JS object 16 at offset 0x13F2A 285 bytes
javascript_obj0017_002.js
660be3f51d5850aac986b540dd246129c55bd78bb743e0492c9d6a4c83b4486a		 pdf-javascript-stream PDF /JS object 17 at offset 0x1404E 235 bytes

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