Malicious PDF — malware analysis report

Static analysis result for SHA-256 4374d4a043f04a8d…

MALICIOUS

PDF

42.2 KB Created: 2018-12-07 18:29:59 +03:00 Authoring application: PScript5.dll Version 5.2.2 (via Acrobat Distiller 5.0.5 (Windows))
MD5: b3b2f4de6a8dc35020b3af7867924a46 SHA-1: 97449aba48d3e1cf31d41920da1eb2b810d0f07e SHA-256: 4374d4a043f04a8dbef013167a0dfcda98fc131ed82f21a27f0cfc9c002c9572
90 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a large external link farm, pointing to numerous documents hosted on 'gorillawalker.com'. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the sheer volume of external links suggests a malicious intent, possibly for SEO poisoning or to act as a distribution point for other threats. The document body was heavily obfuscated and unreadable.

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/military-deception-and-strategic-surprise.pdf
    • http://www.gorillawalker.com/us-army-technical-manual-aviation-unit-maintenance-avum-and-aviation.pdf
    • http://www.gorillawalker.com/serious-poker.pdf
    • http://www.gorillawalker.com/lexical-ambiguity-in-poetry-studies-in-language-and-linguistics.pdf
    • http://www.gorillawalker.com/deutsches-business-magazin-journalistic-approach-to-reading-german.pdf
    • http://www.gorillawalker.com/the-waterfall-concept.pdf
    • http://www.gorillawalker.com/jericho-moon.pdf
    • http://www.gorillawalker.com/rvr60-reina-valera-1960-giant-print-bible-spanish-edition.pdf
    • http://www.gorillawalker.com/collins-new-school-thesaurus.pdf
    • http://www.gorillawalker.com/the-complete-polyethylene-film-extrusion-manual.pdf
    • http://www.gorillawalker.com/the-art-and-technique-of-digital-color-correction-focal-press.pdf
    • http://www.gorillawalker.com/art-answers-portrait-painting-art-answers-paperback-common.pdf
    • http://www.gorillawalker.com/baptismal-regeneration.pdf
    • http://www.gorillawalker.com/adjusting-to-the-situation-granite-county-3-siren-publishing-everlasting.pdf
    • http://www.gorillawalker.com/the-researchers-library-of-ancient-texts-volume-one-the-apocrypha.pdf
    • http://www.gorillawalker.com/explicit-birational-geometry-of-3-folds-london-mathematical-society-lecture.pdf
    • http://www.gorillawalker.com/la-blue-girl-collection-volume-2.pdf
    • http://www.gorillawalker.com/edgar-the-eagle-in-do-your-best.pdf
    • http://www.gorillawalker.com/radical-constructivism-in-action-building-on-the-pioneering-work-of.pdf
    • http://www.gorillawalker.com/sonatas-for-piano-duet-pf-4hands.pdf
    • http://www.gorillawalker.com/my-battle-has-become-my-gift-sometimes-our-purpose-and.pdf
    • http://www.gorillawalker.com/funny-side-of-ronnie-corbett-no-2.pdf
    • http://www.gorillawalker.com/michelin-green-guide-croatie-croatia-in-french-french-edition.pdf
    • http://www.gorillawalker.com/site-dance-choreographers-and-the-lure-of-alternative-spaces-kindle.pdf
    • http://www.gorillawalker.com/berlitz-german-phrase-book-cd-english-and-german-edition.pdf
    • http://www.gorillawalker.com/data-modeling-for-the-business-a-handbook-for-aligning-the.pdf
    • http://www.gorillawalker.com/children-of-the-yellow-kid-the-evolution-of-the-american.pdf
    • http://www.gorillawalker.com/diagnosis-and-management-of-bowel-diseases-3e.pdf
    • http://www.gorillawalker.com/state-and-local-politics-the-great-entanglement.pdf
    • http://www.gorillawalker.com/eating-my-words.pdf
    • http://www.gorillawalker.com/prayers-for-bedtime-hand-prayer-books.pdf
    • http://www.gorillawalker.com/apple-watch-master-your-apple-watch-complete-user-guide-from.pdf
    • http://www.gorillawalker.com/subhadra.pdf
    • http://www.gorillawalker.com/communicating-the-law-lessons-from-landmark-legal-cases.pdf
    • http://www.gorillawalker.com/high-performance-handling-for-street-or-track-vehicle-dynamics-suspension.pdf
    • http://www.gorillawalker.com/the-transformative-humanities-a-manifesto.pdf
    • http://www.gorillawalker.com/vertebrate-paleontological-techniques-volume-1.pdf
    • http://www.gorillawalker.com/monster-trucks-look-look.pdf
    • http://www.gorillawalker.com/don-t-sweat-the-small-stuff-about-money-spiritual-and.pdf
    • http://www.gorillawalker.com/rip-van-winkle-picture-puffins.pdf
    • http://www.gorillawalker
    • 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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