Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ad34c3c6c99ed3…

MALICIOUS

PDF

42.6 KB Created: 2019-04-08 18:17:37 +03:00 Authoring application: PSCRIPT.DRV Version 4.0 (via Acrobat Distiller 3.01 for Windows)
MD5: 4deef4a40cc36aa29547427a6f80d88b SHA-1: 7b952109a38c465351f75711dc8ecc2f0ba4b032 SHA-256: 25ad34c3c6c99ed35a74eefb139156c6a58344b997ad848895577e0de4d9f81a
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, limiting the ability to determine specific malicious actions beyond the link farm.

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/black-professional-women-in-recent-american-fiction.pdf
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    • http://www.gorillawalker.com/the-right-to-useful-work.pdf
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    • http://www.gorillawalker.com/simply-a-safer-way-an-effective-guide-to-electro-acupuncture.pdf
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    • http://www.gorillawalker.com/historic-resource-study-chesapeake-ohio-canal-volume-2.pdf
    • http://www.gorillawalker.com/p-c-industry-critical-cog-in-u-s-economy-study.pdf
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    • http://www.gorillawalker.com/student-solutions-manual-to-accompany-general-organic-and-biological-chemistry.pdf
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    • http://www.gorillawalker.com/yiddish-a-nation-of-words.pdf
    • http://www.gorillawalker.com/royal-navy-trawlers-part-2-requsitioned-trawlers.pdf
    • http://www.gorillawalker.com/mother-son.pdf
    • http://www.gorillawalker.com/sing-a-new-song-portraits-of-canada-s-crusading-bishops.pdf
    • http://www.gorillawalker.com/computers-are-your-future-introductory-12th-edition.pdf
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    • http://www.gorillawalker.com/twins-found-in-a-box-adapting-to-adoption.pdf
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    • http://www.gorillawalker.com/sailing-a-sailor-s-dictionary-a-dictionary-for-landlubbers-old.pdf
    • http://www.gorillawalker.com/mixed-martial-arts-and-combat-sports.pdf
    • http://www.gorillawalker.com/secret-guide-to-places-of-worship-in-bangkok-discover-thailand.pdf
    • http://www.gorillawalker.com/quarantine-1-the-loners-kindle-edition.pdf
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    • http://www.gorillawalker.com/hollywood-to-honolulu-the-story-of-the-los-angeles-steamship.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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