Malicious PDF — malware analysis report

Static analysis result for SHA-256 c903043361b58942…

MALICIOUS

PDF

32.8 KB Created: 2019-11-23 19:52:23 +03:00 Authoring application: Writer (via OpenOffice.org 2.4)
MD5: f389556a1e607e66b6dd9b32d841882e SHA-1: e2e571cd9551abb1090ccc0fdb99b87330a8bc6c SHA-256: c903043361b58942ea26deaf052bccb1e294030d03411eec073f5e22d1ad0917
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to host malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, 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 found within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8529

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/the-interrogation-short-story-series-book-13.pdf
    • http://www.gorillawalker.com/abc-s-write-and-wipe-lowercase-letters-kumon-flash-cards.pdf
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    • http://www.gorillawalker.com/writers-on-organizations-6e.pdf
    • http://www.gorillawalker.com/avery-ontiveros-corrada-selmi-and-hart-s-employment-discrimination-law.pdf
    • http://www.gorillawalker.com/the-art-of-dying-the-only-book-for-persons-facing.pdf
    • http://www.gorillawalker.com/torn-volume-1.pdf
    • http://www.gorillawalker.com/the-laughter-and-the-tears-building-a-jewish-school-to.pdf
    • http://www.gorillawalker.com/the-political-economy-of-pipelines-a-century-of-comparative-institutional.pdf
    • http://www.gorillawalker.com/the-secret-life-of-saeed-third-world-literature-series.pdf
    • http://www.gorillawalker.com/short-stories-vol-1-short-stories-volume-1.pdf
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    • http://www.gorillawalker.com/landscape-planning-for-energy-conservation.pdf
    • http://www.gorillawalker.com/ukraina-zachodnia-1-500-000-i-lw-w-1-10.pdf
    • http://www.gorillawalker.com/erotic-aerobics.pdf
    • http://www.gorillawalker.com/mentoring-developing-a-programme-for-the-staff-in-your-business.pdf
    • http://www.gorillawalker.com/orehaongakutuuorenimakaseronorebyu-haorenimakasero-japanese-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/melissa-s-saving-grace-corbin-s-bend-season-three.pdf
    • http://www.gorillawalker.com/people-s-history-of-sports-in-the-united-states-250.pdf
    • http://www.gorillawalker.com/film-making-contact.pdf
    • http://www.gorillawalker.com/learn-to-draw-disney-s-favorite-fairies-learn-to-draw.pdf
    • http://www.gorillawalker.com/free-help-for-managing-attention-deficit-hyperactivity-disorder-in-the.pdf
    • http://www.gorillawalker.com/post-breakup-sex-copperline-book-1.pdf
    • http://www.gorillawalker.com/relativity-and-the-nature-of-spacetime-the-frontiers-collection.pdf
    • http://www.gorillawalker.com/introduction-to-matrices-linear-transformations-1st-edition.pdf
    • http://www.gorillawalker.com/cupido-en-el-monte-de-afrodita-spanish-edition.pdf
    • http://www.gorillawalker.com/best-of-victor-for-boys.pdf
    • http://www.gorillawalker.com/getting-naked-with-tiffany.pdf
    • http://www.gorillawalker.com/chinese-readers-series-d-blue-readers-waking-up-what-are.pdf
    • http://www.gorillawalker.com/ancient-egypt-transformed-the-middle-kingdom.pdf
    • http://www.gorillawalker.com/amana-colonies-gd-din-lodg-tour-97.pdf
    • http://www.gorillawalker.com/the-best-poems-of-the-english-language-from-chaucer-through.pdf
    • http://www.gorillawalker.com/corrupted-russkaya-mafiya-book-4.pdf
    • http://www.gorillawalker.com/camping-out-level-1-little-critter-first-readers.pdf
    • http://www.gorillawalker.com/the-legal-exploits-of-randolph-mason.pdf
    • http://www.gorillawalker.com/spanisch-lernen-spanische-sprichw-rter-redewendungen-ausdr-cke-german-edition.pdf
    • http://www.gorillawalker.com/just-friends-chloe-jade-a-first-time-lesbian-romance-short.pdf
    • http://www.gorillawalker.c
    • 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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