Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4c5364b3b5bbf4…

MALICIOUS

PDF

44.0 KB Created: 2018-12-15 20:04:52 +03:00 Authoring application: dvips(k) 5.95a Copyright 2005 Radical Eye Software (via AFPL Ghostscript 8.51)
MD5: c276f1b265a359c939f0dfdcc326ef4b SHA-1: ffe7224c57c37dd343caf1f2edf927aa43becbfd SHA-256: 2a4c5364b3b5bbf41622b0159ac4df01f76c66138c69cbfccc1555754a6b484a
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier and contains a large number of embedded external links, primarily pointing to PDF files on www.gorillawalker.com. This suggests a link farm or SEO manipulation tactic, potentially used to distribute malware or phish for credentials through the linked documents. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the immediate intent beyond the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8859

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/textbook-of-radiopharmacy-theory-and-practice.pdf
    • http://www.gorillawalker.com/cucina-vini-and-castelli-italian-favourite-recipes-for-the-discerning.pdf
    • http://www.gorillawalker.com/blanche-knott-s-book-of-truly-tasteless-etiquette.pdf
    • http://www.gorillawalker.com/confirmation-student-service-project-notebook-kindle-edition.pdf
    • http://www.gorillawalker.com/opposing-viewpoints-series-media-violence-hardcover-edition.pdf
    • http://www.gorillawalker.com/shellshocked.pdf
    • http://www.gorillawalker.com/somewhere-nowhere-kindle-edition.pdf
    • http://www.gorillawalker.com/blackbarn.pdf
    • http://www.gorillawalker.com/symbolism-in-architecture-design-jean-pierre-heim-architect.pdf
    • http://www.gorillawalker.com/audio-cd-program-for-kontakte.pdf
    • http://www.gorillawalker.com/guardianship-for-the-elderly-guardianship-law.pdf
    • http://www.gorillawalker.com/games-puzzles-and-computation.pdf
    • http://www.gorillawalker.com/the-forgotten-revolution-when-history-forgets-revisiting-critical-places-of.pdf
    • http://www.gorillawalker.com/martial-arts-for-children-winning-ways-mastering-martial-arts.pdf
    • http://www.gorillawalker.com/new-crafts-basketwork-25-practical-basket-making-projects-for-every.pdf
    • http://www.gorillawalker.com/jagdeinsitzer-heinkel-he-100-weltrekordmaschine-und-propagandavogel-volume-120.pdf
    • http://www.gorillawalker.com/the-seminar-of-jacques-lacan-the-ethics-of-psychoanalysis-vol.pdf
    • http://www.gorillawalker.com/gossips-gorgons-and-crones-the-fates-of-the-earth.pdf
    • http://www.gorillawalker.com/the-complete-book-of-dwarves-advanced-dungeons-dragons-player-s.pdf
    • http://www.gorillawalker.com/by-lonely-planet-lonely-planet-argentina-travel-guide-9th-edition.pdf
    • http://www.gorillawalker.com/new-developments-in-birth-defects-research.pdf
    • http://www.gorillawalker.com/the-ultimate-ruger-10-22-manual-and-user-s-guide.pdf
    • http://www.gorillawalker.com/the-victorian-gardener-paperback.pdf
    • http://www.gorillawalker.com/systems-and-software-verification-model-checking-techniques-and-tools.pdf
    • http://www.gorillawalker.com/you-can-make-a-puppet-now-how-to-make-patterns.pdf
    • http://www.gorillawalker.com/krapp-s-last-tape.pdf
    • http://www.gorillawalker.com/congenital-club-foot-its-nature-and-treatment-with-special-reference.pdf
    • http://www.gorillawalker.com/black-man-white-man-afghan-rags-to-riches-to-wealth.pdf
    • http://www.gorillawalker.com/paris-i-love-you-but-you-re-bringing-me-down.pdf
    • http://www.gorillawalker.com/brochures-5-graphis-brochures-no-5.pdf
    • http://www.gorillawalker.com/then-you-happened-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/in-granma-s-wake-girl-stella-s-voyage-to-cuba.pdf
    • http://www.gorillawalker.com/black-sun-the-eyes-of-four-roots-and-innovation-in.pdf
    • http://www.gorillawalker.com/effective-inhalation-therapy.pdf
    • http://www.gorillawalker.com/russian-for-chessplayers.pdf
    • http://www.gorillawalker.com/demi-lovato-songs-quiz-book-96-q-a-about-songs.pdf
    • http://www.gorillawalker.com/poland-eyewitness-travel-guides-by-turp-craig-2007-paperback.pdf
    • http://www.gorillawalker.com/acid-sulfate-soils-a-baseline-for-research-and-development-ilri.pdf
    • http://www.gorillawalker.com/laser-beam-shaping-theory-and-techniques-second-edition-print-replica.pdf
    • http://www.gorillawalker.com/touchpoint-bible-new-living-translation.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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