Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de3495ba3252b6c…

MALICIOUS

PDF

43.2 KB Created: 2018-11-23 08:06:11 +03:00 Authoring application: FrameMaker 10.0.2 (via Acrobat Distiller 9.5.5 (Windows))
MD5: 43cc70b9de3fb50faa02bcd7ba165756 SHA-1: 7b66ac7f144cbf22366ab8aeecef1c04463e5734 SHA-256: 1de3495ba3252b6c275bb3a066c50b793206be365bbe7ab57ea15c8f6202cc11
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. The primary attack pattern involves directing users to a link farm hosted on www.gorillawalker.com, likely as a method for SEO poisoning or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8859

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/chambers-history-factfinder.pdf
    • http://www.gorillawalker.com/izmit-kocaeli-turkey-earthquake-of-august-17-1999-including-duzce.pdf
    • http://www.gorillawalker.com/strike-swiftly-the-70th-tank-battalion-from-north-africa-to.pdf
    • http://www.gorillawalker.com/on-directing.pdf
    • http://www.gorillawalker.com/aggregation-and-fractal-aggregates.pdf
    • http://www.gorillawalker.com/perfection-salad-women-and-cooking-at-the-turn-of-the.pdf
    • http://www.gorillawalker.com/calendar-of-health-observances-and-recognition-days-2002.pdf
    • http://www.gorillawalker.com/miss-masque-issue-one-kindle-edition.pdf
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    • http://www.gorillawalker.com/fundamentals-of-statistics-4th-edition.pdf
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    • http://www.gorillawalker.com/ce-and-cec-reviews-2002-advances-in-the-practice-and.pdf
    • http://www.gorillawalker.com/the-origin-of-species-150th-anniversary-edition-kindle-edition.pdf
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    • http://www.gorillawalker.com/diagnostic-picture-tests-in-pediatric-dentistry-wolfe-medical-atlases.pdf
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    • http://www.gorillawalker.com/commentary-on-being-and-essence-in-de-ente-et-essentia.pdf
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    • http://www.gorillawalker.com/history-of-my-life-vols-11-12.pdf
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    • http://www.gorillawalker.com/2-episoden-aus-lenau-s-faust-s-110-der-naechtliche.pdf
    • http://www.gorillawalker.com/contributions-to-north-american-ichthyology-volume-3.pdf
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    • http://www.gorillawalker.com/inventors-famous-lives.pdf
    • http://www.gorillawalker.com/calendar-of-health-observances-and-recogni
    • 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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