Malicious PDF — malware analysis report

Static analysis result for SHA-256 3559c89511f284d1…

MALICIOUS

PDF

32.5 KB Created: 2020-03-28 00:14:30 +03:00 Authoring application: Writer (via OpenOffice.org 2.0)
MD5: 33ad860d004f95a244e21546432dfc37 SHA-1: bc971bf27766da25608b3b25c0ede543cfc2d388 SHA-256: 3559c89511f284d1d77011376254bbf1da2dcc7610d427c321a7cf5b50d6d158
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 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 attack pattern involves directing users to a large collection of external documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8529

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/food-security-indicators-measurement-and-the-impact-of-trade-openness.pdf
    • http://www.gorillawalker.com/cases-and-materials-on-copyright-and-other-aspects-of-entertainment.pdf
    • http://www.gorillawalker.com/retribution-bk-1.pdf
    • http://www.gorillawalker.com/technical-development-for-the-clarinetist.pdf
    • http://www.gorillawalker.com/principles-of-active-network-synthesis-and-design.pdf
    • http://www.gorillawalker.com/costa-rica-highway-road-map-bilingual-2006-english-and-spanish.pdf
    • http://www.gorillawalker.com/safety-culture-an-innovative-leadership-approach.pdf
    • http://www.gorillawalker.com/the-burroughs-cyclopaedia-characters-places-fauna-flora-technologies-languages-ideas.pdf
    • http://www.gorillawalker.com/requiem-2-piano-sheet-music-author-fariborz-lachini-published-on.pdf
    • http://www.gorillawalker.com/power-culture-and-violence-in-the-andes-sussex-library-of.pdf
    • http://www.gorillawalker.com/alla-dessa-promenader-i-stockholmstrakten-swedish-edition.pdf
    • http://www.gorillawalker.com/supporting-graduate-students-in-the-21st-century-implications-for-policy.pdf
    • http://www.gorillawalker.com/the-mistake-i-made-a-novel.pdf
    • http://www.gorillawalker.com/the-fearless-flyer-how-to-fly-in-comfort-and-without.pdf
    • http://www.gorillawalker.com/emunch-no-text-and-image.pdf
    • http://www.gorillawalker.com/the-ultimate-carbohydrate-counter.pdf
    • http://www.gorillawalker.com/giannina-mia-waltz-sheet-music-mulpiple-instuments-and-parts-piani.pdf
    • http://www.gorillawalker.com/capitalism-should-you-buy-it-an-invitation-to-political-economy.pdf
    • http://www.gorillawalker.com/philosophical-studies-c-1611-c-1619-the-oxford-francis-bacon.pdf
    • http://www.gorillawalker.com/mastering-flash-photography-a-course-in-basic-to-advanced-lighting.pdf
    • http://www.gorillawalker.com/costa-rica-true-books-countries.pdf
    • http://www.gorillawalker.com/subjects-of-deceit-a-phenomenology-of-lying.pdf
    • http://www.gorillawalker.com/enjoying-india-the-essential-handbook.pdf
    • http://www.gorillawalker.com/mastering-the-zone-the-next-step-in-achieving-superhealth-and.pdf
    • http://www.gorillawalker.com/coaching-the-team-11-a-side-practise-methods-for-players.pdf
    • http://www.gorillawalker.com/recession-prevention-handbook-eleven-case-studies-1948-2007.pdf
    • http://www.gorillawalker.com/chuck-s-day-off.pdf
    • http://www.gorillawalker.com/origin-of-coral-reefs-and-islands.pdf
    • http://www.gorillawalker.com/canadian-edition-of-earth-an-introduction-to-physical-geology-canadian.pdf
    • http://www.gorillawalker.com/a-history-of-railroading-in-western-north-carolina.pdf
    • http://www.gorillawalker.com/the-story-of-monet-and-renior-a-color-and-learn.pdf
    • http://www.gorillawalker.com/cluster-munitions-and-international-law-disarmament-with-a-human-face.pdf
    • http://www.gorillawalker.com/gastrointestinal-oncology.pdf
    • http://www.gorillawalker.com/investigation-of-methods-of-determining-terrain-conditions-by-interpretation-of.pdf
    • http://www.gorillawalker.com/principles-of-alternating-current-machinery-electrical-engineering-texts.pdf
    • http://www.gorillawalker.com/the-seduction-of-christianity.pdf
    • http://www.gorillawalker.com/resources-endeavour-books.pdf
    • http://www.gorillawalker.com/la-clave-del-maestro-para-manipular-el-tiempo-spanish-edition.pdf
    • http://www.gorillawalker.com/new-york-rangers-great-sports-teams-in-history.pdf
    • http://www.gorillawalker.com/reservas-forestales-protectoras-nacionales-de-colombia-atlas-basico.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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