Malicious PDF — malware analysis report

Static analysis result for SHA-256 2506e08d1cdb1fc6…

MALICIOUS

PDF

41.6 KB Created: 2018-11-30 20:34:22 +03:00 Authoring application: Adobe InDesign CS4 (6.0.4) (via Adobe PDF Library 9.0)
MD5: d3ad71113c389f08b99decc7ac2fd92c SHA-1: 785d39192be550503770372b32e187349c3a1a4f SHA-256: 2506e08d1cdb1fc6e5c3bb5e0e7c68a202c7f55980fc83c14bded7aaa5f4908f
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 pointing to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact nature of the lure beyond the link farm. The primary attack pattern involves directing users to a large collection of external PDFs.

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-sciences-of-homosexuality-in-early-modern-europe.pdf
    • http://www.gorillawalker.com/glass-ceramic-whitewares-annual-book-of-astm-standards-2002-vol.pdf
    • http://www.gorillawalker.com/king-solomon-s-ring-new-light-on-animal-ways.pdf
    • http://www.gorillawalker.com/the-mermaids-singing-tony-hill-carol-jordan.pdf
    • http://www.gorillawalker.com/this-is-the-way-we-go-to-school-scholastic-news.pdf
    • http://www.gorillawalker.com/introducing-psychology-a-graphic-guide-introducing-kindle-edition.pdf
    • http://www.gorillawalker.com/resource-allocation-problems-algorithmic-approaches-foundations-of-computing.pdf
    • http://www.gorillawalker.com/poor-man-s-wilderness-survival-kit-assembling-your-emergency-gear.pdf
    • http://www.gorillawalker.com/women-s-dermatology-an-issue-of-dermatologic-clinics-1e-the.pdf
    • http://www.gorillawalker.com/birds-of-oregon-field-guide.pdf
    • http://www.gorillawalker.com/dr-donsbach-tells-you-menopause-hysterectomy-what-you-always-wanted.pdf
    • http://www.gorillawalker.com/us-army-technical-manual-tm-5-3740-206-24p-sprayer.pdf
    • http://www.gorillawalker.com/stones-and-cord-in-glass.pdf
    • http://www.gorillawalker.com/carved-in-sand-when-attention-fails-and-memory-fades-in.pdf
    • http://www.gorillawalker.com/we-shall-see-the-king.pdf
    • http://www.gorillawalker.com/cancer-as-initiation-surviving-the-fire-dreamcatcher.pdf
    • http://www.gorillawalker.com/the-grownup-a-story-by-the-author-of-gone-girl.pdf
    • http://www.gorillawalker.com/graphic-effects-in-architectural-drawings.pdf
    • http://www.gorillawalker.com/fuego-y-hielo-entre-las-latinas.pdf
    • http://www.gorillawalker.com/focus-on-grammar-2-an-integrated-skills-approach-third-edition.pdf
    • http://www.gorillawalker.com/village-pumps-shire-library.pdf
    • http://www.gorillawalker.com/stink-and-the-incredible-super-galactic-jawbreaker.pdf
    • http://www.gorillawalker.com/life-under-the-eastern-sky.pdf
    • http://www.gorillawalker.com/charlie-chaplin-a-brief-life-ackroyd-s-brief-lives.pdf
    • http://www.gorillawalker.com/buttercups-and-strong-boys-penguin-sports-library.pdf
    • http://www.gorillawalker.com/mexico-under-fire-being-the-diary-of-samuel-ryan-curtis.pdf
    • http://www.gorillawalker.com/the-other-guy-blinked-and-other-dispatches-from-the-cola.pdf
    • http://www.gorillawalker.com/a-virgin-conceived-mary-and-classical-representations-of-virginity-book.pdf
    • http://www.gorillawalker.com/morocco-that-was.pdf
    • http://www.gorillawalker.com/hannah-weiner-s-open-house.pdf
    • http://www.gorillawalker.com/disciplined-by-his-landlady.pdf
    • http://www.gorillawalker.com/pilgrim-stories-on-and-off-the-road-to-santiago-journeys.pdf
    • http://www.gorillawalker.com/has-jack-the-ripper-told-you-chaps-what-his-real.pdf
    • http://www.gorillawalker.com/transgender-beauty-queen.pdf
    • http://www.gorillawalker.com/heuristic-search-theory-and-applications.pdf
    • http://www.gorillawalker.com/desaster-nummer-3-erotischer-liebesroman-ded-by-rabengut-4-german.pdf
    • http://www.gorillawalker.com/researching-power-elites-and-leadership.pdf
    • http://www.gorillawalker.com/double-team-teenage-mutant-ninja-turtles-step-into-reading.pdf
    • http://www.gorillawalker.com/the-chaucer-story-book-illustrated-kindle-edition.pdf
    • http://www.gorillawalker.com/my-birthday-album-my-photography.pdf
    • http://www.gorillawalker.com/poor-man-s-wilderness-survival-kit-assembling-your-emergency-
    • 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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