Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39e241f7c67dfb9…

MALICIOUS

PDF

45.1 KB Created: 2018-12-02 20:17:59 +03:00 Authoring application: PScript5.dll Version 5.2 (via GPL Ghostscript 8.15)
MD5: f5ec79977b4a619a1458fc2206285e5c SHA-1: 8d46c92134c43437e7b7a31794c030613a297e57 SHA-256: a39e241f7c67dfb9598fd41a9fc88880cede96bc0b7254d7389aa18eb63100ab
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing 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, limiting the ability to determine further malicious intent beyond the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8812

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/applied-statistical-inference-likelihood-and-bayes.pdf
    • http://www.gorillawalker.com/en-natt-bland-fjellen-s-ngspel-i-tv-akter-fritt.pdf
    • http://www.gorillawalker.com/foreigners-in-mikadoland-tut-books-h.pdf
    • http://www.gorillawalker.com/the-two-sources-of-morality-and-religion.pdf
    • http://www.gorillawalker.com/iso-7860-1995-motorcycles-methods-of-measuring-fuel-consumption.pdf
    • http://www.gorillawalker.com/art-of-war.pdf
    • http://www.gorillawalker.com/vermonia-7-battle-for-the-turtle-realm.pdf
    • http://www.gorillawalker.com/diccionario-grafot-cnico-spanish-edition.pdf
    • http://www.gorillawalker.com/children-s-writer-s-illustrator-s-market-1996-children-s.pdf
    • http://www.gorillawalker.com/learning-about-prayer.pdf
    • http://www.gorillawalker.com/coffee-diet-blank-recipe-book-your-own-personalized-blank-recipe.pdf
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    • http://www.gorillawalker.com/fundamental-principles-of-the-metaphysic-of-morals.pdf
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    • http://www.gorillawalker.com/the-power-of-self-healing-unlock-your-natural-healing-potential.pdf
    • http://www.gorillawalker.com/class-two-at-the-zoo.pdf
    • http://www.gorillawalker.com/breaking-the-vicious-circle-toward-effective-risk-regulation.pdf
    • http://www.gorillawalker.com/balance-your-body-balance-your-life-total-health-rejuvenation-hardcover.pdf
    • http://www.gorillawalker.com/achieving-better-golf-practical-handbook.pdf
    • http://www.gorillawalker.com/fantasia-on-christmas-carols-vocal-score-english-qty-3-a7675.pdf
    • http://www.gorillawalker.com/the-metabolic-pathway-engineering-handbook-two-volume-set.pdf
    • http://www.gorillawalker.com/after-words-real-sex-from-gay-men-s-diaries.pdf
    • http://www.gorillawalker.com/l-is-for-lobster-a-maine-alphabet-discover-america-state.pdf
    • http://www.gorillawalker.com/martin-genealogy-tied-to-the-history-of-germanna-virginia.pdf
    • http://www.gorillawalker.com/stormy-weather-the-music-and-lives-of-a-century-of.pdf
    • http://www.gorillawalker.com/dvorak-575-pages-piano-sheet-music-collection-on-cd.pdf
    • http://www.gorillawalker.com/the-new-complete-book-of-mexican-cooking-by-elisabeth-lambert.pdf
    • http://www.gorillawalker.com/boston-marathon-world-s-greatest-sporting-events.pdf
    • http://www.gorillawalker.com/sciatica-exercises-home-treatment-simple-effective-care-for-sciatica-and.pdf
    • http://www.gorillawalker.com/optimal-b1-lehrbuch-german-edition.pdf
    • http://www.gorillawalker.com/kiss-sell-writing-for-advertising-redesigned-rekissed-paperback-common.pdf
    • http://www.gorillawalker.com/sports-and-politics-goodbye-sydney-2000-hallo-athens-2004-an.pdf
    • http://www.gorillawalker.com/the-art-of-reflexology-a-new-approach-using-the-chinese.pdf
    • http://www.gorillawalker.com/edexcel-a-level-physics-student-book-2-activebook-edexcel-a.pdf
    • http://www.gorillawalker.com/sight-reading-building-the-foundation-for-trumpet.pdf
    • http://www.gorillawalker.com/insect-cell-cultures-fundamental-and-applied-aspects-current-applications-of.pdf
    • http://www.gorillawalker.com/beretning-om-christianias-almueskole-vaesen-danish-edition.pdf
    • http://www.gorillawalker.com/computer-graphics-adaptation-of-several-aerodynamic-prediction-programs.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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