Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74cf46cd61c829f…

MALICIOUS

PDF

40.9 KB Created: 2018-12-11 20:45:03 +03:00 Authoring application: pdftk 1.44 - www.pdftk.com (via itext-paulo-155 (itextpdf.sf.net-lowagie.com))
MD5: da53dec87200470a80bc2e2d073503be SHA-1: b3630e1e170744d284c61ab68efc6a190b01eb85 SHA-256: d74cf46cd61c829fb04622a5106861e53c9a640a69218aa1107350e7577aca09
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded external links, primarily pointing to PDF files on the domain www.gorillawalker.com. This suggests a link farm or SEO poisoning attack designed to drive traffic to external resources, potentially for malicious purposes. No scripts were extracted from this sample.

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/consciousness-in-transition-metaphysical-notes.pdf
    • http://www.gorillawalker.com/construyendo-la-nueva-seguridad-y-salud-en-el-trabajo-t.pdf
    • http://www.gorillawalker.com/transhumanism-and-society-the-social-debate-over-human-enhancement-springerbriefs.pdf
    • http://www.gorillawalker.com/unlock-level-4-reading-and-writing-skills-student-s-book.pdf
    • http://www.gorillawalker.com/the-poet-s-guide-to-life-the-wisdom-of-rilke.pdf
    • http://www.gorillawalker.com/strangers-in-blood-fur-trade-company-families-in-indian-country.pdf
    • http://www.gorillawalker.com/carving-bears-patterns-and-reference-for-realistic-woodcarving.pdf
    • http://www.gorillawalker.com/pillaging-the-world.pdf
    • http://www.gorillawalker.com/roxi-needs-a-home-kindle-edition.pdf
    • http://www.gorillawalker.com/the-herb-lady-s-notebook.pdf
    • http://www.gorillawalker.com/isaiah-spirit-of-courage-gift-of-tears.pdf
    • http://www.gorillawalker.com/pooh-who-hid-the-honey-a-mouse-works-roly-poly.pdf
    • http://www.gorillawalker.com/more-far-out-facts-books-for-world-explorers.pdf
    • http://www.gorillawalker.com/beast-in-view-bantam-1542.pdf
    • http://www.gorillawalker.com/ramona-the-brave-cd.pdf
    • http://www.gorillawalker.com/dispuesta-a-todo-deseo-spanish-edition.pdf
    • http://www.gorillawalker.com/video-game-programming-for-kids.pdf
    • http://www.gorillawalker.com/polymer-solutions.pdf
    • http://www.gorillawalker.com/come-to-the-light-an-invitation-to-baptism-and-confirmation.pdf
    • http://www.gorillawalker.com/lamont-moon-s-rising.pdf
    • http://www.gorillawalker.com/the-united-states-pharmacopeia-and-the-national-formulary-supplement.pdf
    • http://www.gorillawalker.com/good-lookin-old-women-survival-of-the-fittest-kindle-edition.pdf
    • http://www.gorillawalker.com/neonatology-colour-guide-colour-guides.pdf
    • http://www.gorillawalker.com/odysseus-and-the-odyssey-graphic-mythical-heroes.pdf
    • http://www.gorillawalker.com/hush-little-monster.pdf
    • http://www.gorillawalker.com/is-95-cdma-and-cdma2000-cellular-pcs-systems-implementation.pdf
    • http://www.gorillawalker.com/holt-mcdougal-literature-student-one-stop-dvd-grade-9-2012.pdf
    • http://www.gorillawalker.com/minnie-mouse-wall-calendar-2016.pdf
    • http://www.gorillawalker.com/neanderthals-bandits-and-farmers-how-agriculture-really-began-darwinism-today.pdf
    • http://www.gorillawalker.com/retail-buying-8th-edition.pdf
    • http://www.gorillawalker.com/moon-angkor-wat-including-siem-reap-phnom-penh-moon-handbooks.pdf
    • http://www.gorillawalker.com/the-blue-effect-cold-war.pdf
    • http://www.gorillawalker.com/faces-of-the-game.pdf
    • http://www.gorillawalker.com/the-best-rock-pop-fake-book-for-c-instruments-kindle.pdf
    • http://www.gorillawalker.com/the-rich-man-and-diseased-poor-in-early-victorian-literature.pdf
    • http://www.gorillawalker.com/gorgany-mountains-south-carpathians-ukraine-1-50-000-hiking-map.pdf
    • http://www.gorillawalker.com/simple-aerodynamics-and-the-airplane.pdf
    • http://www.gorillawalker.com/chesterfield-county-chronicles-stories-from-the-james-to-the-appomattox.pdf
    • http://www.gorillawalker.com/brilliant-orange.pdf
    • http://www.gorillawalker.com/mouse-count-lap-sized-board-book.pdf
    • http://www.gorillawalker.com/pillaging-t
    • 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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