Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1a39d8b1899310…

MALICIOUS

PDF

35.3 KB Created: 2019-11-10 05:18:07 +03:00 Authoring application: Acrobat PDFMaker 11 for Word (via Adobe PDF Library 11.0)
MD5: 9b72dc5a22d00414689237d64fa78648 SHA-1: 5ed7a3585460f1938552d488af00df4cde1bdce5 SHA-256: 2d1a39d8b18993102bbd3c3a85943b6ee80cf6725ef593caa47f48fef769b257
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF sample was flagged by a machine learning classifier and a critical heuristic for containing a large number of external links. The embedded URLs point to various PDF files hosted on www.gorillawalker.com. While no malicious script was directly extracted, the sheer volume and nature of the links suggest a malicious intent, possibly for SEO manipulation or to serve as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8255

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/cultureshock-korea-culture-shock-korea-kindle-edition.pdf
    • http://www.gorillawalker.com/midnight-man-a-canterbury-tale-of-mystery-and-murder.pdf
    • http://www.gorillawalker.com/the-sonnets-shakespeare-explained.pdf
    • http://www.gorillawalker.com/it-s-easy-to-play-marches-efs-239.pdf
    • http://www.gorillawalker.com/proceedings-of-the-first-workshop-on-the-promotion-of-limnology.pdf
    • http://www.gorillawalker.com/formwork-for-concrete-structures.pdf
    • http://www.gorillawalker.com/the-brick-testament-the-story-of-christmas.pdf
    • http://www.gorillawalker.com/pilates-relaxation-health-fitness-health-and-wellbeing.pdf
    • http://www.gorillawalker.com/die-reue-nach-der-that-german-edition.pdf
    • http://www.gorillawalker.com/sports-illustrated-blood-sweat-chalk-the-ultimate-football-playbook-how.pdf
    • http://www.gorillawalker.com/reeds-astro-navigation-tables-2006-reeds-marine-engineering-s.pdf
    • http://www.gorillawalker.com/manatee-county-florida-sheriff-s-office-1855-2005-150th-anniversary.pdf
    • http://www.gorillawalker.com/genealogical-history-showing-the-paternal-line-of-descent-from-arthur.pdf
    • http://www.gorillawalker.com/nancy-clark-s-food-guide-for-marathoners-tips-for-everyday.pdf
    • http://www.gorillawalker.com/aesthetics-and-architecture-bloomsbury-aesthetics.pdf
    • http://www.gorillawalker.com/the-bare-facts-of-general-pathology.pdf
    • http://www.gorillawalker.com/the-sun-soap-quiz-book-2-000-questions-on-your.pdf
    • http://www.gorillawalker.com/indira-gandhi-1917-1984-role-model-or-flawed-leader-p.pdf
    • http://www.gorillawalker.com/the-art-of-doing-nothing-simple-ways-to-make-time.pdf
    • http://www.gorillawalker.com/the-last-hero-bill-tilman-a-biography-of-the-explorer.pdf
    • http://www.gorillawalker.com/the-audio-theater-guide-vocal-acting-writing-sound-effects-and.pdf
    • http://www.gorillawalker.com/gorgeous-for-good-a-simple-30-day-program-for-lasting.pdf
    • http://www.gorillawalker.com/also-sprach-zarathustra-op-30-percussion-part-qty-2-a2120.pdf
    • http://www.gorillawalker.com/pamphlet-architecture-30-coupling-strategies-for-infrastructural-opportunism.pdf
    • http://www.gorillawalker.com/mountain-ecology-in-the-australian-region-proceedings-of-the-ecological.pdf
    • http://www.gorillawalker.com/cape-town-encounters-portraits-of-diversity-kindle-edition.pdf
    • http://www.gorillawalker.com/sports-psychology.pdf
    • http://www.gorillawalker.com/orthodoxy-and-the-cold-war-religion-and-political-power-in.pdf
    • http://www.gorillawalker.com/revolution-in-oriental-medicine-tao-shiatsu.pdf
    • http://www.gorillawalker.com/people-plants-and-genes-the-story-of-crops-and-humanity.pdf
    • http://www.gorillawalker.com/the-illustrated-dictionary-of-mathematics.pdf
    • http://www.gorillawalker.com/by-minecraft-books-minecraft-jokes-for-kids-hilarious-minecraft-jokes.pdf
    • http://www.gorillawalker.com/common-vetch-management-in-rice-fallow-blackgram-a-chemical-weed.pdf
    • http://www.gorillawalker.com/eating-disorders-the-april-2002-issue-of-the-child-and.pdf
    • http://www.gorillawalker.com/notes-from-a-spinning-planet-papua-new-guinea-kindle-edition.pdf
    • http://www.gorillawalker.com/book-publishing-v-4-critical-concepts-in-media-and-cultural.pdf
    • http://www.gorillawalker.com/the-germans-at-beaumont-hamel-battleground-europe.pdf
    • http://www.gorillawalker.com/a-volcano-in-my-tummy-helping-children-to-handle-anger.pdf
    • http://www.gorillawalker.com/physics-for-scientists-and-engineers-volume-2c-elementary-modern-physics.pdf
    • http://www.gorillawalker.com/comprehensive-planning-for-safe-learning-environments-a-school-professional-s.pdf
    • http://www.gorillawalker.com/proceedings-of-the-first-worksho
    • 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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