Malicious PDF — malware analysis report

Static analysis result for SHA-256 9440d4f4e19e54fe…

MALICIOUS

PDF

41.2 KB Created: 2018-11-14 21:34:26 +03:00 Authoring application: dvips(k) 5.99 Copyright 2010 Radical Eye Software (via Acrobat Distiller 9.4.5 (Windows))
MD5: 105a7d8cc1dc8ea8806ec13c6786c307 SHA-1: 2d395b1b57fb5e5ecb6e303c0317fccb7bc97913 SHA-256: 9440d4f4e19e54fef737def592131d6835cf7e8d56b3c1c3d70771dd357f5c84
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on www.gorillawalker.com. This is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous external links is the primary indicator of malicious intent.

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/hayman-levit-and-delgado-s-jurisprudence-classical-and-contemporary-from.pdf
    • http://www.gorillawalker.com/buck-lake-safety-book-the-essential-lake-safety-guide-for.pdf
    • http://www.gorillawalker.com/multilayer-and-grazing-incidence-x-ray-euv-optics-for-astronomy.pdf
    • http://www.gorillawalker.com/masonary-techniques-brick-block-concrete-for-pros-by-pros.pdf
    • http://www.gorillawalker.com/feed-your-face-younger-smoother-skin-and-a-beautiful-body.pdf
    • http://www.gorillawalker.com/the-glass-industry-in-south-boston.pdf
    • http://www.gorillawalker.com/high-performance-computing-risc-architectures-optimization-benchmarks.pdf
    • http://www.gorillawalker.com/trade-policy-and-corporate-business-decisions-a-research-book-from.pdf
    • http://www.gorillawalker.com/tales-of-the-spanish-illustrated-kindle-edition.pdf
    • http://www.gorillawalker.com/daily-warm-ups-for-logic-daily-warm-ups-math-series.pdf
    • http://www.gorillawalker.com/course-in-isaac-pitman-shorthand-a-series-of-lessons-in.pdf
    • http://www.gorillawalker.com/the-complete-book-of-questions-1001-conversation-starters-for-any.pdf
    • http://www.gorillawalker.com/minerals-yearbook-2003-v-3-area-reports-international-africa-and.pdf
    • http://www.gorillawalker.com/split-second-maggie-o-dell-novels.pdf
    • http://www.gorillawalker.com/hydraulic-machines.pdf
    • http://www.gorillawalker.com/electronic-systems-in-action.pdf
    • http://www.gorillawalker.com/les-go-ts-r-unis-ou-nouveaux-concerts-huitieme-concert.pdf
    • http://www.gorillawalker.com/the-hands-of-day-english-and-spanish-edition.pdf
    • http://www.gorillawalker.com/danish-literature-saxo-grammaticus-to-isak-dinesen-houghton-library-publications.pdf
    • http://www.gorillawalker.com/the-art-of-war-visualized-the-sun-tzu-classic-in.pdf
    • http://www.gorillawalker.com/the-lea-perrins-worcestershire-sauce-cookbook-by-hartley-paul-2005.pdf
    • http://www.gorillawalker.com/woman-s-world-calendar-cook-book-1885-1973-allen-ida.pdf
    • http://www.gorillawalker.com/steinbranding-2006-book-branding-design-book-logo-brand-art-design.pdf
    • http://www.gorillawalker.com/the-plaster-fabric-20th-century.pdf
    • http://www.gorillawalker.com/michelle-sheet-music.pdf
    • http://www.gorillawalker.com/pvc-technology-fourth-edition.pdf
    • http://www.gorillawalker.com/las-plantas-fumables-spanish-edition.pdf
    • http://www.gorillawalker.com/current-bibliographies-in-medicine-volume-53.pdf
    • http://www.gorillawalker.com/standards-for-online-communication.pdf
    • http://www.gorillawalker.com/a-crocodile-ate-the-alphabet-kindle-edition.pdf
    • http://www.gorillawalker.com/panama-to-patagonia-the-isthmian-canal-and-the-west-coast.pdf
    • http://www.gorillawalker.com/march-to-freedom-a-memoir-of-the-holocaust.pdf
    • http://www.gorillawalker.com/jewish-holidays-all-year-round-a-family-treasury.pdf
    • http://www.gorillawalker.com/what-happens-in-vegas-hot-for-you-stripped-red-handed.pdf
    • http://www.gorillawalker.com/the-calorie-counter-for-dummies.pdf
    • http://www.gorillawalker.com/the-stereoscope-its-history-theory-and-construction-with-its-application.pdf
    • http://www.gorillawalker.com/hemodynamic-monitoring-a-pocket-reference-manual.pdf
    • http://www.gorillawalker.com/sports-law-second-edition.pdf
    • http://www.gorillawalker.com/the-war-of-the-worlds-large-print-edition.pdf
    • http://www.gorillawalker.com/topics-in-recreational-mathematics-1-2015-volume-1.pdf
    • http://www.gorillawalker.com/tales-of-the-spanish-i
    • 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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