Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d81ec4878ff33f7…

MALICIOUS

PDF

42.5 KB Created: 2018-12-15 08:52:29 +03:00 Authoring application: PScript5.dll Version 5.2 (via GPL Ghostscript 8.15)
MD5: d66225cf13bf52df031aea8593f5b41e SHA-1: 77152795bdc6772831a04044122ea8581dc8ee3f SHA-256: 1d81ec4878ff33f7312f804ee7b6b1ce125b957a6eb76db00e1f01195b725e7b
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was identified as malicious by an ML classifier and contains a large number of external links, indicating a link farm. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on www.gorillawalker.com. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of specific user-facing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8698

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://www.gorillawalker.com/wanted-women-faith-lies-and-the-war-on-terror-the.pdf
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    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

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