Malicious PDF — malware analysis report

Static analysis result for SHA-256 559464c0af7b6a30…

MALICIOUS

PDF

43.0 KB Created: 2018-12-07 18:27:28 +03:00 Authoring application: (Infix Pro) (via PDFKit.NET 3.0.58.0) First seen: 2019-01-12
MD5: 2cc5a2be59b090af21237c2d7dafc025 SHA-1: ef604d1df047b8efe7c42b761a8b5de1336a861f SHA-256: 559464c0af7b6a30541c713e439992e299434f5a219a17a2dc936be0538a13ef
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The critical PDF_SEO_LINK_FARM heuristic indicates this PDF is part of a link farm, containing 32 external links to other PDFs hosted on www.gorillawalker.com. The ML classifier also flagged this PDF as malicious. The embedded URLs are likely used for SEO manipulation or to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8242

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/dialogues-conversations-de-facebook-exp-riences-d-un-r-seau.pdf
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    • http://www.gorillawalker.com/history-of-scotland
    • 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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