Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fb9d916c223082…

MALICIOUS

PDF

43.1 KB Created: 2019-03-16 14:59:10 +03:00 Authoring application: LaTeX with hyperref package (via dvips + ps2pdf)
MD5: 58696fa847ae0fae645fe0552a0b8986 SHA-1: 3a0ffa7fc913eda00d37df8544449e0ecf87b407 SHA-256: b9fb9d916c2230827080975f82b323e95ec7448689cdb8d8828a1da3042ef6ed
90 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and a critical heuristic for containing a large number of external links. The document body, though heavily obfuscated, contains numerous URLs pointing to PDF files on the same domain. This suggests a link farm or a distribution mechanism for other malicious content, rather than a typical document lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

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/design-with-nature.pdf
    • http://www.gorillawalker.com/malcolm-hillier-s-entertaining.pdf
    • http://www.gorillawalker.com/cacti-succulents-101-essential-tips.pdf
    • http://www.gorillawalker.com/chicken-soup-for-the-teenage-soul-stories-of-life-love.pdf
    • http://www.gorillawalker.com/the-plumtree-papers-a-history-of-bulalima-mangwe-and-life.pdf
    • http://www.gorillawalker.com/the-dark-side-of-school-reform-teaching-in-the-space.pdf
    • http://www.gorillawalker.com/professional-rodeo-cowboys-association-media-guide-official-media-guide-of.pdf
    • http://www.gorillawalker.com/grandpa-plays-hide-and-seek-trog.pdf
    • http://www.gorillawalker.com/reading-german-a-course-book-and-reference-grammar.pdf
    • http://www.gorillawalker.com/peranakan-museum-guide.pdf
    • http://www.gorillawalker.com/casenote-legal-briefs-evidence-keyed-to-welborn.pdf
    • http://www.gorillawalker.com/south-african-folk-tales.pdf
    • http://www.gorillawalker.com/against-understanding-volume-2-cases-and-commentary-in-a-lacanian.pdf
    • http://www.gorillawalker.com/chemical-microstructure-of-polymer-chains.pdf
    • http://www.gorillawalker.com/the-oxford-dictionary-of-philosophy.pdf
    • http://www.gorillawalker.com/fluffy-bunny-soft-to-touch-books.pdf
    • http://www.gorillawalker.com/how-to-complain-the-essential-consumer-s-guide-to-gaining.pdf
    • http://www.gorillawalker.com/a-world-aflame-interwar-wargame-rules-1918-39-osprey-wargames.pdf
    • http://www.gorillawalker.com/18-easy-laptop-repairs-worth-60-000-a-year-kindle.pdf
    • http://www.gorillawalker.com/sarasota-modern.pdf
    • http://www.gorillawalker.com/gua-sha-a-traditional-technique-for-modern-practice-1e.pdf
    • http://www.gorillawalker.com/club-luxe-4-tortured-heart-billionaires-underground.pdf
    • http://www.gorillawalker.com/gluten-free-family-favorites-the-75-go-to-recipes-you.pdf
    • http://www.gorillawalker.com/reparando-tv-plasma-y-lcd-repairing-plasma-tv-and-lcd.pdf
    • http://www.gorillawalker.com/everyday-smoothies.pdf
    • http://www.gorillawalker.com/the-fog-of-war-censorship-of-canada-s-media-in.pdf
    • http://www.gorillawalker.com/10-things-you-gotta-know-about-paying-for-college.pdf
    • http://www.gorillawalker.com/slovenia-croatia-serbia-bosnie-herz-mac-fb-j159.pdf
    • http://www.gorillawalker.com/microwaves-theory-and-application-in-materials-processing-ceramic-transactions.pdf
    • http://www.gorillawalker.com/from-the-outside-in-from-satisfaction-search-to-finding-faith.pdf
    • http://www.gorillawalker.com/communities-magazine-22-september-1976-networking-in-the-ozarks-kindle.pdf
    • http://www.gorillawalker.com/the-social-capitalist-passion-and-profits-an-entrepreneurial-journey-rich.pdf
    • http://www.gorillawalker.com/british-destroyers-in-world-war-two-warships-illustrated-no-4.pdf
    • http://www.gorillawalker.com/geometrical-combinatorial-topology-vol-ii-van-nostrand-reinhold-mathematical-studies.pdf
    • http://www.gorillawalker.com/dungeons-dreamers-a-story-of-how-computer-games-created-a.pdf
    • http://www.gorillawalker.com/difficult-pmp-exam-questions-extra-practice-on-the-hard-questions.pdf
    • http://www.gorillawalker.com/trade-secrets.pdf
    • http://www.gorillawalker.com/images-of-all-unicode-characters-on-kindle-keyboard-3-3.pdf
    • http://www.gorillawalker.com/pearson-custom-economics-econ-205-engineering-economics-virginia-commonwealth-university.pdf
    • http://www.gorillawalker.com/italian-order-of-battle-in-world-war-ii-volume-2.pdf
    • http://www.gorillawalker.com/the-dark-side-of-school-refor
    • 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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