Malicious PDF — malware analysis report

Static analysis result for SHA-256 41fdf68d1b1c1189…

MALICIOUS

PDF

43.3 KB Created: 2018-12-02 20:13:05 +03:00 Authoring application: doPDF Ver 7.2 Build 376 (Windows XP Professional Edition (SP 3) - Version: 5.1.2600 (x86))
MD5: 625e0b9cb1c520dce42dacb8ab5beb5c SHA-1: f6abd84bd898ddcf5707391b5992979052896d33 SHA-256: 41fdf68d1b1c1189cf985ef301c82289b224cd4330f585d0ead538960aae9811
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files on the same domain, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or redirection strategy. The ML classifier also flagged the document as malicious. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8452

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/just-for-fun-swingin-jazz-ukulele-12-great-songs-of.pdf
    • http://www.gorillawalker.com/all-sondheim-volume-3.pdf
    • http://www.gorillawalker.com/lebanon-a-country-study.pdf
    • http://www.gorillawalker.com/computerized-data-acquisition-and-analysis-for-the-life-sciences-a.pdf
    • http://www.gorillawalker.com/counseling-teor-a-y-pr-ctica-spanish-edition.pdf
    • http://www.gorillawalker.com/annual-reports-on-nmr-spectroscopy-volume-85.pdf
    • http://www.gorillawalker.com/curves-for-the-king-bbw-erotic-romance-anthology-kindle-edition.pdf
    • http://www.gorillawalker.com/jigsaw-man.pdf
    • http://www.gorillawalker.com/song-of-lawino-song-of-ocol-african-writers.pdf
    • http://www.gorillawalker.com/the-automatic-millionaire-workbook-a-personalized-plan-to-live-and.pdf
    • http://www.gorillawalker.com/mira-y-la-piedra-mira-and-the-stone-tortoise.pdf
    • http://www.gorillawalker.com/the-oromo-and-the-christian-kingdom-of-ethiopia-eastern-africa.pdf
    • http://www.gorillawalker.com/tb-1-1520-240-20-94-one-time-and-recurring.pdf
    • http://www.gorillawalker.com/honey-badgers-bad-to-the-bone-nastiest-animals.pdf
    • http://www.gorillawalker.com/the-poet-and-the-vampyre-the-curse-of-byron-and.pdf
    • http://www.gorillawalker.com/physics-and-technology-of-solar-energy-volume-1-solar-thermal.pdf
    • http://www.gorillawalker.com/motor-truck-repair-manual.pdf
    • http://www.gorillawalker.com/do-lunch-or-be-lunch-the-power-of-predictability-in.pdf
    • http://www.gorillawalker.com/field-hockey-training-for-young-players-introducing-the-game-to.pdf
    • http://www.gorillawalker.com/aspects-of-the-masculine-aspects-of-the-feminine.pdf
    • http://www.gorillawalker.com/hannibal-s-children.pdf
    • http://www.gorillawalker.com/northern-italian-cooking-simple-classic-recipes-regional-italian-cooking-volume.pdf
    • http://www.gorillawalker.com/rhetorical-style-the-uses-of-language-in-persuasion.pdf
    • http://www.gorillawalker.com/clinician-s-guide-to-self-renewal-essential-advice-from-the.pdf
    • http://www.gorillawalker.com/studying-the-life-of-saint-francis-of-assisi-a-beginner.pdf
    • http://www.gorillawalker.com/by-lindsay-adler-shooting-in-sh-tty-light-the-top.pdf
    • http://www.gorillawalker.com/the-wake-of-imagination-toward-a-postmodern-culture.pdf
    • http://www.gorillawalker.com/finger-ring-lore-historical-legendary-anecdotal.pdf
    • http://www.gorillawalker.com/the-30-day-sobriety-solution-how-to-cut-back-or.pdf
    • http://www.gorillawalker.com/climbing-up-on-the-rough-side.pdf
    • http://www.gorillawalker.com/the-cheetah-fast-as-lightning-animal-close-ups.pdf
    • http://www.gorillawalker.com/making-it-big-sex-stars-porn-films-and-me.pdf
    • http://www.gorillawalker.com/practical-sql-the-sequel-with-cd-rom.pdf
    • http://www.gorillawalker.com/doing-a-literature-review-in-health-and-social-care-a.pdf
    • http://www.gorillawalker.com/breach-of-trust-hardcover.pdf
    • http://www.gorillawalker.com/fundamentals-of-quantum-electronics.pdf
    • http://www.gorillawalker.com/comparative-semitic-philology-in-the-middle-ages-from-sa-adiah.pdf
    • http://www.gorillawalker.com/leviticus-23-27-the-anchor-yale-bible-commentaries.pdf
    • http://www.gorillawalker.com/career-opportunities-in-the-energy-industry.pdf
    • http://www.gorillawalker.com/el-estandarte-spanish-edition.pdf
    • http://www.gorillawalke
    • 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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