Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b48b526619a618c…

MALICIOUS

PDF

42.5 KB Created: 2019-03-17 07:00:37 +03:00 Authoring application: QuarkXPress¢â: LaserWriter 8 KH-8.7.1 (via Acrobat Distiller 4.05 for Macintosh)
MD5: 532591cc7de34878faa171ae3ca80e04 SHA-1: 61d0153ec8a5d45913e7d14f9dab2f49d105e956 SHA-256: 7b48b526619a618ca4e16500f623295e5ba8bacfa373496db8b58c832ff89bff
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. The embedded URLs suggest an attempt to manipulate search engine results or redirect users to potentially harmful content hosted on the gorillawalker.com domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

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/how-to-find-your-ideal-country-home-a-comprehensive-guide.pdf
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    • http://www.gorillawalker.com/tewkesbury-churchwardens-accounts-1563-1624-gloucestershire-records.pdf
    • 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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