Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad540a9cbee250d…

MALICIOUS

PDF

45.6 KB Created: 2018-12-14 20:04:28 +03:00 Authoring application: FrameMaker 5.5.6. (via Acrobat Distiller 4.05 for Sparc Solaris)
MD5: 23b16fadca0a52c5e48617ce17a57e5b SHA-1: 00ae6d8b95c691b7bd0b40795c39034e98ccbf04 SHA-256: 2ad540a9cbee250d6f70d0a2e910b8468a6909f2c813d79ca2bc8a980e45b12a
150 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Dropper.Agent-7140545-0 and a machine learning classifier. Static analysis revealed a significant number of embedded external links pointing to other PDF files on the domain www.gorillawalker.com. This behavior is consistent with a link farm designed to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8634

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7140545-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7140545-0
  • 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/intuitive-analog-circuit-design-second-edition.pdf
    • http://www.gorillawalker.com/family-houses-by-the-sea.pdf
    • http://www.gorillawalker.com/governing-fables-learning-from-public-sector-narratives-research-in-public.pdf
    • http://www.gorillawalker.com/the-spud-book-101-ways-to-cook-potatoes.pdf
    • http://www.gorillawalker.com/understanding-nato-in-the-21st-century-alliance-strategies-security-and.pdf
    • http://www.gorillawalker.com/ukulele-song-book-5-20-more-popular-songs-with-lyrics.pdf
    • http://www.gorillawalker.com/antenna-arrays-and-automotive-applications.pdf
    • http://www.gorillawalker.com/the-forgotten-one-the-untold-story-of-a-woman-who.pdf
    • http://www.gorillawalker.com/construction-operations-manual-of-policies-and-procedures-fifth-edition.pdf
    • http://www.gorillawalker.com/nationalist-thought-and-the-colonial-world-a-derivative-discourse.pdf
    • http://www.gorillawalker.com/transcending-css-the-fine-art-of-web-design.pdf
    • http://www.gorillawalker.com/sweet-surprise-kindle-edition.pdf
    • http://www.gorillawalker.com/to-other-worlds-telescopes-rockets-stars.pdf
    • http://www.gorillawalker.com/el-principe-de-los-judios-y-otros-relatos-de-la.pdf
    • http://www.gorillawalker.com/concentration-functional-inequalities-and-isoperimetry-international-workshop-on-concentration-functional.pdf
    • http://www.gorillawalker.com/progressive-guitar-method-book-2-intermediate.pdf
    • http://www.gorillawalker.com/astro-economics.pdf
    • http://www.gorillawalker.com/i-can-believe-in-myself-i-can-book-series.pdf
    • http://www.gorillawalker.com/an-intellectual-history-of-political-corruption-political-corruption-and-governance.pdf
    • http://www.gorillawalker.com/loose-knit.pdf
    • http://www.gorillawalker.com/antarctic-journal-four-months-at-the-bottom-of-the-world.pdf
    • http://www.gorillawalker.com/the-low-gi-diet-cookbook-100-simple-delicious-smart-carb.pdf
    • http://www.gorillawalker.com/evaluation-and-treatment-of-chronic-pain.pdf
    • http://www.gorillawalker.com/el-estrecho-dudoso-spanish-edition.pdf
    • http://www.gorillawalker.com/behind-the-badge-love-inspired-suspense.pdf
    • http://www.gorillawalker.com/shield-of-the-great-leader-the-armed-forces-of-north.pdf
    • http://www.gorillawalker.com/flim-microscopy-in-biology-and-medicine.pdf
    • http://www.gorillawalker.com/joseph-stalin-essential-lives.pdf
    • http://www.gorillawalker.com/iodine-super-mineral-understanding-iodine-and-using-it-to-improve.pdf
    • http://www.gorillawalker.com/cowboy-christmas-an-anthology-of-christmas-tales-from-the-old.pdf
    • http://www.gorillawalker.com/ontology-of-complexity-a-reading-of-gregory-bateson.pdf
    • http://www.gorillawalker.com/the-nut-milk-bible-what-you-need-and-what-you.pdf
    • http://www.gorillawalker.com/origami-magic-17-amazing-tricks-puzzles-and-illusions.pdf
    • http://www.gorillawalker.com/flood-control-regulations-of-the-prc-paperback.pdf
    • http://www.gorillawalker.com/templates-for-75-bar-essays-e-book-ivy-black-letter.pdf
    • http://www.gorillawalker.com/green-building-and-sustainable-development-the-practical-legal-guide.pdf
    • http://www.gorillawalker.com/design-manual-for-roads-and-bridges-skidding-resistance.pdf
    • http://www.gorillawalker.com/simple-times-crafts-for-poor-people-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/all-about-real-estate-investing-from-the-inside-out.pdf
    • http://www.gorillawalker.com/a-marriage-made-in-heaven-or-too-tired-for-an.pdf
    • http://www.gorillawalker.com/ukulele-song-book-5-20-more-popular-songs-wit
    • 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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