Malicious PDF — malware analysis report

Static analysis result for SHA-256 150cd34dd168b76b…

MALICIOUS

PDF

42.4 KB Created: 2018-12-15 20:00:36 +03:00 Authoring application: TeX (via MiKTeX pdfTeX-1.10b)
MD5: b160067e3a339aa2f0f3408a7668df94 SHA-1: 70d609e494f28176709b853b073997d1e8249417 SHA-256: 150cd34dd168b76b137bb455860ff1fd26199d0c4f37abc3b2c6de0de045c177
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by an ML classifier as malicious. It contains a large number of embedded URLs pointing to external PDF documents on the domain 'gorillawalker.com'. This behavior is consistent with a link farm or SEO manipulation tactic, potentially used to distribute further malicious content or to improve search engine rankings for malicious sites. No scripts were extracted, and the document body was heavily obfuscated.

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/le-parti-pris-des-choses-de-francis-ponge-les-fiches.pdf
    • http://www.gorillawalker.com/der-dokumentarfilm-seit-1960-bucher-report-film-german-edition.pdf
    • http://www.gorillawalker.com/handbook-of-petroleum-analysis.pdf
    • http://www.gorillawalker.com/journalismus-f-rs-fernsehen-dramaturgie-gestaltung-genres-praxiswissen-medien-german.pdf
    • http://www.gorillawalker.com/while-you-were-sleeping-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/a-manual-of-modern-scholastic-philosophy-volume-i-cosmology-psychology.pdf
    • http://www.gorillawalker.com/scriptwriting-and-structure.pdf
    • http://www.gorillawalker.com/winning-minds-secrets-from-the-language-of-leadership.pdf
    • http://www.gorillawalker.com/todos-los-cuentos-spanish-edition.pdf
    • http://www.gorillawalker.com/cognitive-therapy-for-chronic-and-persistent-depression.pdf
    • http://www.gorillawalker.com/lickety-split.pdf
    • http://www.gorillawalker.com/differential-geometry-the-mathematical-works-of-j-h-c-whitehead.pdf
    • http://www.gorillawalker.com/a-fine-line-the-baxter-series-5.pdf
    • http://www.gorillawalker.com/john-beech-german-and-english-edition.pdf
    • http://www.gorillawalker.com/jazz-bass-improvisation-book-cd-muscians-institute-msster-class.pdf
    • http://www.gorillawalker.com/kernel-based-algorithms-for-mining-huge-data-sets-supervised-semi.pdf
    • http://www.gorillawalker.com/two-and-two-make-sex-french-s-acting-edition.pdf
    • http://www.gorillawalker.com/lassoed-by-the-werestallion.pdf
    • http://www.gorillawalker.com/bridesmaid-wants-to-dance-paranormal-vampire-erotica-vampire-quickies-book.pdf
    • http://www.gorillawalker.com/algebra-and-trigonometry-a-graphing-approach.pdf
    • http://www.gorillawalker.com/mega-events-and-globalization-capital-and-spectacle-in-a-changing.pdf
    • http://www.gorillawalker.com/holland-images-of-modern-america.pdf
    • http://www.gorillawalker.com/cases-and-materials-on-modern-property-law-american-casebook-series.pdf
    • http://www.gorillawalker.com/baby-and-child-healthcare-the-essential-a-z-home-reference.pdf
    • http://www.gorillawalker.com/technical-analysis-of-stock-trends-8th-edition.pdf
    • http://www.gorillawalker.com/metal-of-night.pdf
    • http://www.gorillawalker.com/l-ecriture-du-levant-la-renaissance-enqu-te-sur-les.pdf
    • http://www.gorillawalker.com/the-thief-and-the-sword-cleopatra-in-space.pdf
    • http://www.gorillawalker.com/backdoor-babes-brazilian-booty.pdf
    • http://www.gorillawalker.com/castle-of-the-undead-endless-quest.pdf
    • http://www.gorillawalker.com/repair-and-regeneration-of-ligaments-tendons-and-joint-capsule-orthopedic.pdf
    • http://www.gorillawalker.com/the-fifth-sacred-thing.pdf
    • http://www.gorillawalker.com/story-engineering.pdf
    • http://www.gorillawalker.com/my-first-broadway-song-book-a-treasury-of-favorite-songs.pdf
    • http://www.gorillawalker.com/arrive-alive-motorist-s-guide-to-personal-safety.pdf
    • http://www.gorillawalker.com/vegan-diet-plan-healthy-weight-loss-kindle-edition.pdf
    • http://www.gorillawalker.com/housing-and-the-financial-crisis-national-bureau-of-economic-research.pdf
    • http://www.gorillawalker.com/an-introduction-to-sparse-stochastic-processes.pdf
    • http://www.gorillawalker.com/tres-sombreros-de-copa-three-top-hats-maribel-y-la.pdf
    • http://www.gorillawalker.com/chronicle-vocational-school-manual-2004-2005-a-directory-of-accredited.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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