Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9d8ce23c6e6987…

MALICIOUS

PDF

44.2 KB Created: 2019-02-13 20:13:48 +03:00 Authoring application: - (via GPL Ghostscript 8.70)
MD5: 0836ac51a11582a4aa6c3a140da6ff9a SHA-1: 6f7434ee3196725797f564e5d1ec01ae0cfe5d98 SHA-256: 5f9d8ce23c6e69876349a916d19a4a2eedb1d4e7b3d0a7e63a7b6f9493cd7ff4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of embedded links pointing to external PDF files on the domain 'gorillawalker.com'. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute potentially malicious content. The ML classifier also flagged this PDF as malicious, supporting the suspicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8173

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/letters-of-king-james-vi-and-i.pdf
    • http://www.gorillawalker.com/the-professional-edition-of-j-k-lasser-s-your-income.pdf
    • http://www.gorillawalker.com/the-jewish-kitchen-recipes-and-stories-from-around-the-world.pdf
    • http://www.gorillawalker.com/preteen-teacher-146-s-convenience-kit-151-spring-2015-heartshaper.pdf
    • http://www.gorillawalker.com/statistics-in-plain-english-2nd-edition.pdf
    • http://www.gorillawalker.com/armorbearer-training-series-a-devotion-to-serve-devotional-book.pdf
    • http://www.gorillawalker.com/the-literature-of-international-business-finance-a-bibliography-of-selected.pdf
    • http://www.gorillawalker.com/physique-2012-wall-calendar.pdf
    • http://www.gorillawalker.com/violeta-y-el-camino-de-los-22-arcanos-spanish-edition.pdf
    • http://www.gorillawalker.com/richard-scarry-s-what-do-people-do-all-day.pdf
    • http://www.gorillawalker.com/crepusculo-twilight-spanish-edition.pdf
    • http://www.gorillawalker.com/ave-maria-adapted-to-the-first-prelude-of-j-s.pdf
    • http://www.gorillawalker.com/building-law-encyclopaedia.pdf
    • http://www.gorillawalker.com/modern-masters-volume-14-frank-cho-modern-masters-twomorrows-publishing.pdf
    • http://www.gorillawalker.com/wizard-the-life-and-times-of-nikola-tesla-biography-of.pdf
    • http://www.gorillawalker.com/ohthere-s-voyages-a-late-9th-century-account-of-voyages.pdf
    • http://www.gorillawalker.com/fd-munich-1985.pdf
    • http://www.gorillawalker.com/professional-results-with-canon-vixia-camcorders-a-field-guide-to.pdf
    • http://www.gorillawalker.com/the-dailey-vincent-songbook.pdf
    • http://www.gorillawalker.com/the-bible-word-book-a-glossary-of-archaic-words-and.pdf
    • http://www.gorillawalker.com/heads-up-a-story-of-one-quarter.pdf
    • http://www.gorillawalker.com/foreign-trade-barriers-to-the-u-s-products-and-services.pdf
    • http://www.gorillawalker.com/medical-parasitology-study-guide-third-edition-chinese-edition.pdf
    • http://www.gorillawalker.com/the-life-of-saint-margaret-of-cortona.pdf
    • http://www.gorillawalker.com/hands-on-reflexology-a-complete-guide.pdf
    • http://www.gorillawalker.com/adobe-for-fashion-illustrator-cs6.pdf
    • http://www.gorillawalker.com/obstacles-techniques-au-commerce-french-edition.pdf
    • http://www.gorillawalker.com/basic-principles-of-ophthalmic-surgery-second-edition.pdf
    • http://www.gorillawalker.com/the-old-inns-of-england-british-heritage-series.pdf
    • http://www.gorillawalker.com/langan-english-skills-with-readings-eighth-edition.pdf
    • http://www.gorillawalker.com/england-travels-through-an-unwrecked-landscape.pdf
    • http://www.gorillawalker.com/accent-on-achievement-trombone-a-comprehensive-band-method-that-develops.pdf
    • http://www.gorillawalker.com/the-hadith-a-taste-of-islam-book-5-kindle-edition.pdf
    • http://www.gorillawalker.com/como-hacer-cria-de-lombrices-how-to-breed-worms-emprendimientos.pdf
    • http://www.gorillawalker.com/cash-and-carry-or-health-insurance-in-ghana-is-there.pdf
    • http://www.gorillawalker.com/suite-for-tuba-tuba-with-piano-accompaniment-songbook.pdf
    • http://www.gorillawalker.com/alley-of-shadows-vortex-books-library-binding.pdf
    • http://www.gorillawalker.com/other-minds-synthese-library.pdf
    • http://www.gorillawalker.com/the-caroler-s-handbook-satb.pdf
    • http://www.gorillawalker.com/606-puzzles-for-chess-nuts-mensa.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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