Malicious PDF — malware analysis report

Static analysis result for SHA-256 3419799645dedaa9…

MALICIOUS

PDF

43.1 KB Created: 2018-11-23 21:03:36 +03:00 Authoring application: TeX (via pdfTeX-0.14h)
MD5: 33738050c172b56004775d48390c0e34 SHA-1: f1866453ee9431e479e13c420912c49944ad8384 SHA-256: 3419799645dedaa974f5229681bc460982bcb3d5085457a3c9c0b84127c16e18
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files on the same domain, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. While no scripts were explicitly extracted, the ML classifier flagged the PDF as malicious. The embedded URLs suggest an attempt to manipulate search engine rankings or distribute additional malicious content, aligning with a spearphishing attachment vector.

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/brother-anselm-s-glenstal-cookbook-spiral-bound.pdf
    • http://www.gorillawalker.com/human-herpes-virus-infections-pathogenesis-diagnosis-and-treatment-order-no.pdf
    • http://www.gorillawalker.com/cash-poor-or-college-the-essential-guide-to-college-admissions.pdf
    • http://www.gorillawalker.com/nelson-handwriting-workbook-six.pdf
    • http://www.gorillawalker.com/fodor-s-nova-scotia-atlantic-canada-11th-edition-with-new.pdf
    • http://www.gorillawalker.com/winning-court-testimony-for-law-enforcement-officers.pdf
    • http://www.gorillawalker.com/breve-historia-de-la-mitolog-a-griega-spanish-edition.pdf
    • http://www.gorillawalker.com/ip-diy-internet-pornography-do-it-yourself-treatment-guide-for.pdf
    • http://www.gorillawalker.com/the-golden-rule-and-the-games-people-play-the-ultimate.pdf
    • http://www.gorillawalker.com/1636-the-devil-s-opera-the-ring-of-fire.pdf
    • http://www.gorillawalker.com/rachel-in-the-world-a-memoir.pdf
    • http://www.gorillawalker.com/requiem-op-89-original-edition-novello-full-score-a2595.pdf
    • http://www.gorillawalker.com/applied-pharmacology-for-the-dental-hygienist-fourth-edition-4th-edition.pdf
    • http://www.gorillawalker.com/animals-in-polar-regions-animal-show-and-tell.pdf
    • http://www.gorillawalker.com/study-of-hanemanns-organon-of-medicine.pdf
    • http://www.gorillawalker.com/white-tailed-deer-fish-game.pdf
    • http://www.gorillawalker.com/invitation-the.pdf
    • http://www.gorillawalker.com/breve-historia-de-sinaloa-fideicomiso-historia-de-las-americas-spanish.pdf
    • http://www.gorillawalker.com/confessions-of-a-kokh-leffle.pdf
    • http://www.gorillawalker.com/lions-baby-animals.pdf
    • http://www.gorillawalker.com/taming-the-tiger-bbw-shifter-mail-order-bride-romance-mail.pdf
    • http://www.gorillawalker.com/bundeswehr-unsere-soldaten-in-afghanistan-german-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/a-kosoy-travel-guide-for-canadians-travelling-abroad-europe-caribbean.pdf
    • http://www.gorillawalker.com/frank-lloyd-wright-s-pope-leighey-house.pdf
    • http://www.gorillawalker.com/spot-a-lot-vehicles-book-and-20-piece-jigsaw-puzzle.pdf
    • http://www.gorillawalker.com/intending-death-the-ethics-of-assisted-suicide-and-euthanasia.pdf
    • http://www.gorillawalker.com/selected-spiritual-writings-of-anne-dutton-eighteenth-century-british-baptist.pdf
    • http://www.gorillawalker.com/the-fiddler-s-fakebook-paperback.pdf
    • http://www.gorillawalker.com/fresh-from-france-2.pdf
    • http://www.gorillawalker.com/spiritual-and-religious-competencies-in-clinical-practice-guidelines-for-psychotherapists.pdf
    • http://www.gorillawalker.com/play-short-badminton.pdf
    • http://www.gorillawalker.com/oral-mycophenolate-mofetil-looks-promising-for-lupus-nephritis-nephrology-an.pdf
    • http://www.gorillawalker.com/song-of-norway-vocal-score.pdf
    • http://www.gorillawalker.com/heat-treatment-structure-and-properties-of-nonferrous-alloys.pdf
    • http://www.gorillawalker.com/krakow-berlitz-pocket-guide-berlitz-pocket-guides.pdf
    • http://www.gorillawalker.com/code-de-la-route-french-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/customer-behavior-a-managerial-perspective-2nd-second-edition.pdf
    • http://www.gorillawalker.com/army-and-navy-service-book.pdf
    • http://www.gorillawalker.com/global-games-for-diversity-education-new-ways-of-learning-in.pdf
    • http://www.gorillawalker.com/voith-power-transmission.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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