Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9be81ca9450035…

MALICIOUS

PDF

41.3 KB Created: 2018-11-15 08:05:03 +03:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 5.0.5 (Windows))
MD5: fb6601a1f439a21fb2d40bc9889a7215 SHA-1: e0127f6863ed0e11110a620a9a063edd21992f72 SHA-256: 3c9be81ca9450035309e0688accb1a1a82e6efddbbddc2970e40bc6d65b48f3b
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, 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, and the document body was heavily obfuscated, making it difficult to determine the exact nature of the lure beyond the link farm. The primary IOCs are the URLs pointing to the linked PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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/the-book-of-love.pdf
    • http://www.gorillawalker.com/gcse-maths-higher-revision-notes-general-gcse-revision-exam-preparation.pdf
    • http://www.gorillawalker.com/52-tips-for-no-limit-hold-em-poker.pdf
    • http://www.gorillawalker.com/holt-mcdougal-algebra-2-common-core-student-curriculum-companion-kit.pdf
    • http://www.gorillawalker.com/knopf-guide-egypt-knopf-guides.pdf
    • http://www.gorillawalker.com/seleccion-poetica-de-federico-garcia-lorca.pdf
    • http://www.gorillawalker.com/drug-fate-and-metabolism-methods-and-techniques.pdf
    • http://www.gorillawalker.com/cat-family-2012-wall-calendar-cad05.pdf
    • http://www.gorillawalker.com/low-power-interconnect-design-lecture-notes-in-electrical-engineering.pdf
    • http://www.gorillawalker.com/monsters-and-legends.pdf
    • http://www.gorillawalker.com/distomap.pdf
    • http://www.gorillawalker.com/the-home-cookbook.pdf
    • http://www.gorillawalker.com/principles-of-international-marketing.pdf
    • http://www.gorillawalker.com/team-effort-systems-based-sports-photography-helps-sportography-score-1.pdf
    • http://www.gorillawalker.com/sport-studies-active-learning-in-sport-series.pdf
    • http://www.gorillawalker.com/protein-on-myplate-what-s-on-myplate.pdf
    • http://www.gorillawalker.com/standing-bear-is-a-person-the-true-story-of-a.pdf
    • http://www.gorillawalker.com/zibby-payne-the-red-carpet-revolt-zibby-payne-zibby-payne.pdf
    • http://www.gorillawalker.com/home-run-from-heaven.pdf
    • http://www.gorillawalker.com/budget-london-london-transport-s-official-guidebooks.pdf
    • http://www.gorillawalker.com/iberian-crime-fiction-cymru-european-crime-fictions.pdf
    • http://www.gorillawalker.com/acante-et-c-phise-ballet-suite-viola-part-qty-4.pdf
    • http://www.gorillawalker.com/student-safety-tips-45-that-every-3rd-5th-grader-must.pdf
    • http://www.gorillawalker.com/a-defence-of-the-reformation-principles-of-the-church-of.pdf
    • http://www.gorillawalker.com/acing-evidence-acing-series-kindle-edition.pdf
    • http://www.gorillawalker.com/saving-your-sex-life-a-guide-for-men-with-prostate.pdf
    • http://www.gorillawalker.com/hurricanes-storms-of-the-sea-storms-of-the-sea-lifeviews.pdf
    • http://www.gorillawalker.com/the-essential-dr-jekyll-and-mr-hyde-the-definitive-annotated.pdf
    • http://www.gorillawalker.com/the-art-and-science-of-healing-since-antiquity.pdf
    • http://www.gorillawalker.com/an-introduction-to-semiconductor-devices.pdf
    • http://www.gorillawalker.com/londongrad-from-russia-with-cash-the-inside-story-of-the.pdf
    • http://www.gorillawalker.com/john-sutter-y-la-fiebre-del-oro-en-california-graphic.pdf
    • http://www.gorillawalker.com/free-spirits.pdf
    • http://www.gorillawalker.com/sheet-molding-compound-materials-science-technology.pdf
    • http://www.gorillawalker.com/the-free-negress-elisabeth.pdf
    • http://www.gorillawalker.com/twenty-four-paul-gauguin-s-paintings-collection-for-kids-kindle.pdf
    • http://www.gorillawalker.com/old-before-my-time-hayley-okines-life-with-progeria-by.pdf
    • http://www.gorillawalker.com/rock-identification-field-guide.pdf
    • http://www.gorillawalker.com/learning-flash-media-server-3-kindle-edition.pdf
    • http://www.gorillawalker.com/1994-update-for-mass-media-law-sixth-edition.pdf
    • http://www.gorillawalker.com/distomap
    • 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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