Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6ab58a00e0ae37…

MALICIOUS

PDF

42.2 KB Created: 2018-12-02 20:18:03 +03:00 Authoring application: TopLeaf 7.6.056 (via iText 2.1.7 by 1T3XT)
MD5: 87077fc4b7e0e5628badd8daf1c64fbe SHA-1: 7d1b8cc7ba4f9aa6f9660666e6b38a9b59fbd973 SHA-256: de6ab58a00e0ae3789c3a7c0472a9083459f97820d86ad32bba7d4ff2c52ea46
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this sample as malicious with high confidence. The document body is heavily obfuscated and unreadable, but the presence of numerous links to external PDFs suggests a link farm or distribution mechanism. No scripts were extracted from this sample.

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/a-melody-for-james-part-1-of-the-song-of.pdf
    • http://www.gorillawalker.com/new-fishes-from-western-colombia-ecuador-and-peru-volume-2.pdf
    • http://www.gorillawalker.com/an-arnhem-odyssey-market-garden-to-stalag-ivb.pdf
    • http://www.gorillawalker.com/rotary-kelly-swivel-tongs-and-top-drive-unit-1-lesson.pdf
    • http://www.gorillawalker.com/an-epic-swindle-44-months-with-a-pair-of-cowboys.pdf
    • http://www.gorillawalker.com/lifeguard-training-activities-and-games.pdf
    • http://www.gorillawalker.com/this-is-what-i-did.pdf
    • http://www.gorillawalker.com/jose-m-de-oriol-y-urquijo-spanish-edition.pdf
    • http://www.gorillawalker.com/the-fallen-series-boxed-set.pdf
    • http://www.gorillawalker.com/the-university-of-ghent-south-east-arabian-archaeological-project-excavations.pdf
    • http://www.gorillawalker.com/do-not-forsake-me-andre-drapp-a-novel.pdf
    • http://www.gorillawalker.com/records-management-student-instruction-manual.pdf
    • http://www.gorillawalker.com/fuego-angelical-magia-leyendas-y-tradiciones-texto-completo-unabridged-audible.pdf
    • http://www.gorillawalker.com/the-studio-musician-s-handbook-music-pro-guides.pdf
    • http://www.gorillawalker.com/nothing-surprising-insights-everywhere-from-zero-to-oblivion.pdf
    • http://www.gorillawalker.com/how-to-seal-your-juvenile-criminal-records-in-california-legal.pdf
    • http://www.gorillawalker.com/mon-premier-est-un-reve-french-edition.pdf
    • http://www.gorillawalker.com/collected-works-volume-ii-publications-1938-1974-collected-works-oxford.pdf
    • http://www.gorillawalker.com/comparative-income-taxation-third-edition.pdf
    • http://www.gorillawalker.com/the-philosophy-of-symbolic-forms-volume-4-the-metaphysics-of.pdf
    • http://www.gorillawalker.com/an-atlas-of-ultrasonography-of-the-dog-and-cat.pdf
    • http://www.gorillawalker.com/threatened-birds-of-asia-the-birdlife-international-red-data-book.pdf
    • http://www.gorillawalker.com/the-wanderer-legends-from-the-ancient-north.pdf
    • http://www.gorillawalker.com/the-corrib-country.pdf
    • http://www.gorillawalker.com/the-heaviest-things.pdf
    • http://www.gorillawalker.com/the-claret-and-blue-book-of-west-ham-united-hammers.pdf
    • http://www.gorillawalker.com/twisting-fate-kindle-edition.pdf
    • http://www.gorillawalker.com/ghost-of-spirit-bear-kindle-edition.pdf
    • http://www.gorillawalker.com/los-empenos-de-una-casa-the-insistences-of-a-house.pdf
    • http://www.gorillawalker.com/zen-flesh-zen-bones-a-collection-of-zen-and-pre.pdf
    • http://www.gorillawalker.com/the-diet-myth-why-the-secret-to-health-and-weight.pdf
    • http://www.gorillawalker.com/5-levels-of-gifted-school-issues-and-educational-options.pdf
    • http://www.gorillawalker.com/muddypaws-busy-day-finger-puppet-book-finger-puppets.pdf
    • http://www.gorillawalker.com/holt-mcdougal-mathematics-student-edition-grade-8-2012.pdf
    • http://www.gorillawalker.com/outbreak-the-hunger.pdf
    • http://www.gorillawalker.com/a-user-s-guide-to-the-universe-surviving-the-perils.pdf
    • http://www.gorillawalker.com/better-living-through-criticism-how-to-think-about-art-pleasure.pdf
    • http://www.gorillawalker.com/osito-polar-y-su-nueva-amiga-el-s-spanish-edition.pdf
    • http://www.gorillawalker.com/seduction-erotic-illustrations-by-robert-w-richards.pdf
    • http://www.gorillawalker.com/advanced-quantum-mechanics-a-practical-guide.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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