Malicious PDF — malware analysis report

Static analysis result for SHA-256 4478de528d6b6864…

MALICIOUS

PDF

45.2 KB Created: 2018-12-15 20:00:45 +03:00 Authoring application: Adobe Acrobat 8.0 (via Adobe Acrobat 8.0 Image Conversion Plug-in)
MD5: ab477a0cb94455074e6bd2ee4205c321 SHA-1: 3d9371f1c9ad5d111c53fe14f3de7a96a4447384 SHA-256: 4478de528d6b6864fd63f695c892ab8b9cfccc3466d690e46de522833bebb462
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this document as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond the link farm. The primary IOCs are the URLs associated with the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8812

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/fanon-collective-ethics-and-humanism.pdf
    • http://www.gorillawalker.com/the-center-cannot-hold-my-journey-through-madness.pdf
    • http://www.gorillawalker.com/basic-legal-research-tools-and-strategies-basic-legal-research-4.pdf
    • http://www.gorillawalker.com/circuits-matrices-and-linear-vector-spaces-dover-books-on-electrical.pdf
    • http://www.gorillawalker.com/guia-ilustrada-de-kayak-de-mar.pdf
    • http://www.gorillawalker.com/pressing-down-the-lever-robotx-get-help-from-simple-machines.pdf
    • http://www.gorillawalker.com/chugokugaku-ronshu-okamura-sadao-hakushi-koki-kinen-japanese-edition.pdf
    • http://www.gorillawalker.com/how-weaning-happens.pdf
    • http://www.gorillawalker.com/betty-crocker-s-guide-to-easy-entertaining-facsimile-edition.pdf
    • http://www.gorillawalker.com/equipment-leasing-4th-edition.pdf
    • http://www.gorillawalker.com/norway-in-colours.pdf
    • http://www.gorillawalker.com/accident-incident-prevention-techniques-second-edition.pdf
    • http://www.gorillawalker.com/fingerplays-and-songs-for-the-very-young-lap-library.pdf
    • http://www.gorillawalker.com/maths-skills-for-pharmacy-unlocking-pharmaceutical-calculations.pdf
    • http://www.gorillawalker.com/catari-heat.pdf
    • http://www.gorillawalker.com/alien-attack-superhero-school-kindle-edition.pdf
    • http://www.gorillawalker.com/the-regulation-of-international-trade-3rd-edition.pdf
    • http://www.gorillawalker.com/educating-english-language-learners-a-synthesis-of-research-evidence.pdf
    • http://www.gorillawalker.com/visvakarmiya-rathalaksanam-a-study-of-ancient-indian-chariots.pdf
    • http://www.gorillawalker.com/the-harvest-the-heartland-trilogy-book-3.pdf
    • http://www.gorillawalker.com/quotable-tiger-potent-quotables.pdf
    • http://www.gorillawalker.com/the-cambridge-history-of-law-in-america-volume-3.pdf
    • http://www.gorillawalker.com/introduction-to-photo-offset-lithography-student-guide.pdf
    • http://www.gorillawalker.com/snowboarding-for-fun-for-fun-sports.pdf
    • http://www.gorillawalker.com/old-bones-and-stained-glass-collected-poems-kindle-edition.pdf
    • http://www.gorillawalker.com/the-art-of-living-sideways-skateboarding-peace-and-elicitive-conflict.pdf
    • http://www.gorillawalker.com/journey-across-the-four-seas-a-chinese-woman-s-search.pdf
    • http://www.gorillawalker.com/adagio-in-c-major-glass-harmonica-easy-violin-sheet-music.pdf
    • http://www.gorillawalker.com/iso-4796-1-2000-laboratory-glassware-bottles-part-1-screw.pdf
    • http://www.gorillawalker.com/the-irwin-handbook-of-telecommunications.pdf
    • http://www.gorillawalker.com/guns-for-the-sultan-military-power-and-the-weapons-industry.pdf
    • http://www.gorillawalker.com/no-easy-choice-a-story-of-disability-parenthood-and-faith.pdf
    • http://www.gorillawalker.com/little-green-an-easy-rawlins-mystery-book-12-unabridged-audible.pdf
    • http://www.gorillawalker.com/the-two-lives-of-sally-miller-a-case-of-mistaken.pdf
    • http://www.gorillawalker.com/overcome-fear-of-spiders-arachnophobia-self-hypnosis-hypnotherapy-cd.pdf
    • http://www.gorillawalker.com/making-men-gender-literary-authority-and-women-s-writing-in.pdf
    • http://www.gorillawalker.com/fulltime-rv-living-45-amazing-rv-living-diy-hacks-to.pdf
    • http://www.gorillawalker.com/the-physician-employment-contract-handbook-second-edition-a-guide-to.pdf
    • http://www.gorillawalker.com/denominations-webster-s-specialty-crossword-puzzles.pdf
    • http://www.gorillawalker.com/information-and-the-internal-structure-of-the-universe-an-exploration.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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