Malicious PDF — malware analysis report

Static analysis result for SHA-256 f795f7bbabb07733…

MALICIOUS

PDF

42.3 KB Created: 2018-11-26 20:09:27 +03:00 Authoring application: PDFCreator Version 1.5.1 (via GPL Ghostscript 9.05)
MD5: abaf3b169ac3d639005e9acccc2eb288 SHA-1: f67948e5aaf27ba4fa7550fa51a2e78d471d378c SHA-256: f795f7bbabb077330e45a347114912db4e6a6a0011641f490308a8306ccb367c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded external links, characteristic of a link farm designed to distribute malicious content or phish users. The primary heuristic identified 32 such links, with the first being http://www.gorillawalker.com/world-war-i-major-u-s-historical-wars.pdf. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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/world-war-i-major-u-s-historical-wars.pdf
    • http://www.gorillawalker.com/my-love-will-set-you-free-a-cupid-s-bow.pdf
    • http://www.gorillawalker.com/deceptive-vows-kindle-edition.pdf
    • http://www.gorillawalker.com/the-modern-pastry-chef-s-guide-to-professional-baking.pdf
    • http://www.gorillawalker.com/bach-the-mass-in-b-minor.pdf
    • http://www.gorillawalker.com/amours-secrettes-de-napol-on-buonaparte-french-edition.pdf
    • http://www.gorillawalker.com/kabbalistic-writings-on-the-nature-of-masculine-and-feminine.pdf
    • http://www.gorillawalker.com/the-old-testament-world-continuum-collection.pdf
    • http://www.gorillawalker.com/in-mortal-combat-korea-1950-1953-easton-press.pdf
    • http://www.gorillawalker.com/otter-in-space-i-am-otter.pdf
    • http://www.gorillawalker.com/globalizing-civil-society-reclaiming-our-right-to-power-open-media.pdf
    • http://www.gorillawalker.com/theory-as-a-prayerful-act-counterpoints.pdf
    • http://www.gorillawalker.com/ladies-home-journal-100-great-cookie-recipes.pdf
    • http://www.gorillawalker.com/a-polar-bear-can-swim-easy-to-read-viking.pdf
    • http://www.gorillawalker.com/canis-lupus-signatus-spanish-edition.pdf
    • http://www.gorillawalker.com/medical-gas-pipeline-systems-bacteria-filter-permit-to-work-health.pdf
    • http://www.gorillawalker.com/harmon-s-journal-1810-1819-classics-west.pdf
    • http://www.gorillawalker.com/it-s-worth-it.pdf
    • http://www.gorillawalker.com/theology-of-the-new-testament-v-1.pdf
    • http://www.gorillawalker.com/interior-landscapes-autobiographical-myths-and-metaphors.pdf
    • http://www.gorillawalker.com/the-metallurgy-of-gold-6th-edition-mining-and-mineral-processing.pdf
    • http://www.gorillawalker.com/modern-card-counting-modern-blackjack-card-counting-techniques-and-systems.pdf
    • http://www.gorillawalker.com/modern-microwave-technology.pdf
    • http://www.gorillawalker.com/a-tour-thro-the-whole-island-of-great-britain.pdf
    • http://www.gorillawalker.com/principles-of-interpretation-mastering-clear-and-concise-interventions-in-psychotherapy.pdf
    • http://www.gorillawalker.com/the-medical-library-for-the-medical-school-or-the-small.pdf
    • http://www.gorillawalker.com/implementation-patterns.pdf
    • http://www.gorillawalker.com/games-magazine-big-book-of-games-ii-10-great-years.pdf
    • http://www.gorillawalker.com/the-international-student-s-guide-to-american-colleges-the-ultimate.pdf
    • http://www.gorillawalker.com/die-verhaal-van-racheltjie-de-beer-afrikaans-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/hurt-to-healing-the-book-kindle-edition.pdf
    • http://www.gorillawalker.com/by-linda-casser-optometry-4th-fourth-edition.pdf
    • http://www.gorillawalker.com/flanders-a-cultural-history-landscapes-of-the-imagination.pdf
    • http://www.gorillawalker.com/collins-design-and-technology-textiles-foundation-course-collins-design-technology.pdf
    • http://www.gorillawalker.com/northern-california-kayaking-the-complete-guide-to-more-than-150.pdf
    • http://www.gorillawalker.com/free-to-learn-why-unleashing-the-instinct-to-play-will.pdf
    • http://www.gorillawalker.com/abracadabra-flute-technique-pupil-s-book-abracadabra-woodwind.pdf
    • http://www.gorillawalker.com/tv-a-go-go-rock-on-tv-from-american-bandstand.pdf
    • http://www.gorillawalker.com/frugal-gourmet-whole-family-cookbook.pdf
    • http://www.gorillawalker.com/rand-mcnally-detroit-michigan-street-guide.pdf
    • http://www.gorillawalker.com/kabbalistic-writings-on-the-nature-of-masculine-and
    • 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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