Malicious PDF — malware analysis report

Static analysis result for SHA-256 503f9b90188e3eb6…

MALICIOUS

PDF

32.2 KB Created: 2019-12-14 10:10:30 +03:00 Authoring application: Acrobat PDFMaker 10.1 for Word (via Adobe PDF Library 10.0)
MD5: aee11a642130c524255d5400e106e5ac SHA-1: 6ef86fd2bf9368431301786012c6f028639187d9 SHA-256: 503f9b90188e3eb626823eb035b92dfeb2b11d503693b9973b64a7a398f58346
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8529

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/gettysburg-the-war-of-the-potomac.pdf
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    • http://www.gorillawalker.com/ruptures-orbital-vol-2.pdf
    • http://www.gorillawalker.com/the-figino-or-on-the-purpose-of-painting-art-theory.pdf
    • http://www.gorillawalker.com/myths-about-neonatal-herpes-simplex-id-consult-an-article-from.pdf
    • http://www.gorillawalker.com/of-course-the-greatest-collection-of-riddles-brain-teasers-for.pdf
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    • http://www.gorillawalker.com/historical-dictionary-of-the-republic-of-guinea-bissau.pdf
    • http://www.gorillawalker.com/solutions-manual-for-investments.pdf
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    • http://www.gorillawalker.com/paradigm-kindle-edition.pdf
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    • http://www.gorillawalker.com/heave-ho-thomas-thomas-friends-a-golden-go-along-book.pdf
    • http://www.gorillawalker.com/scientific-american-supplement-no-315-january-14-1882-kindle-edition.pdf
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    • http://www.gorillawalker.com/medical-informatics-practical-guide-for-healthcare-and-information-technology-professionals.pdf
    • http://www.gorillawalker.com/core-skills-spelling-reproducible-grade-3.pdf
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    • http://www.gorillawalker.com/countdown-to-a-moon-launch-preparing-apollo-for-its-historic.pdf
    • http://www.gorillawalker.com/close-to-home-2008-wall-calendar.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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