Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0b91eafb167944…

MALICIOUS

PDF

32.7 KB Created: 2019-10-29 08:47:17 +03:00 Authoring application: Sejda (Ver. 1.0.0.M6-SNAPSHOT) (via iText 2.1.7 by 1T3XT)
MD5: 2f217d19510cccde6bf3141bcefa10a3 SHA-1: cb4cee8f6ce0f39908a5f1d8a9f23dde1d44336e SHA-256: df0b91eafb1679444a9744c8c514024cd9c141f10d9a3d83abf3cb9828c617c1
90 Risk Score

Malware Insights

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

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 PDF as malicious. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests a malicious intent, possibly for SEO manipulation or to distribute further malware. No scripts were extracted from this sample.

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/holt-texas-texas-student-edition-2003.pdf
    • http://www.gorillawalker.com/natalie-merchant-ophelia.pdf
    • http://www.gorillawalker.com/chu-s-day-kindle-edition.pdf
    • http://www.gorillawalker.com/oca-oracle-database-11g-sql-fundamentals-i-a-real-world.pdf
    • http://www.gorillawalker.com/africana-encyclopedia-of-the-african-and-african-american-experience-vol.pdf
    • http://www.gorillawalker.com/db2-9-7-for-linux-unix-and-windows-database-administration.pdf
    • http://www.gorillawalker.com/ganged-in-the-dorm-room-first-time-alpha-male-group.pdf
    • http://www.gorillawalker.com/oxford-dictionary-of-english-idioms-oxford-dictionary-of-current-idiomatic.pdf
    • http://www.gorillawalker.com/rand-mcnally-streets-of-hawaii-maui-molokai-kauai.pdf
    • http://www.gorillawalker.com/remington-and-klein-s-infectious-diseases-of-the-fetus-and.pdf
    • http://www.gorillawalker.com/behind-the-smile-the-working-lives-of-caribbean-tourism-kindle.pdf
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    • http://www.gorillawalker.com/my-dear-cavalier-by-myrna-multilingual-edition.pdf
    • http://www.gorillawalker.com/mass-media-law-instructor-s-manual.pdf
    • http://www.gorillawalker.com/jamaica-collins-holiday-maps.pdf
    • http://www.gorillawalker.com/giardia-a-model-organism.pdf
    • http://www.gorillawalker.com/kill-shot-code-11-kpd-swat-book-6.pdf
    • http://www.gorillawalker.com/readers-and-reading-culture-in-the-high-roman-empire-a.pdf
    • http://www.gorillawalker.com/big-trends-in-trading-strategies-to-master-major-market-moves.pdf
    • http://www.gorillawalker.com/yamaha-yzf600r-thundercat-96-01-fts-600-fazer-98-01.pdf
    • http://www.gorillawalker.com/drilling-mud-and-cement-slurry-rheology-manual-publication-de-la.pdf
    • http://www.gorillawalker.com/hans-blumenberg-p-dagogische-lekt-ren-german-edition.pdf
    • http://www.gorillawalker.com/oats-peas-beans-and-barley-cookbook.pdf
    • http://www.gorillawalker.com/italy-the-beautiful-cookbook.pdf
    • http://www.gorillawalker.com/the-osirian-codex.pdf
    • http://www.gorillawalker.com/wallpaper-city-guide-houston-2014-wallpaper-city-guides.pdf
    • http://www.gorillawalker.com/megaproject-case-study-of-china-s-three-gorges-project-chinese.pdf
    • http://www.gorillawalker.com/laboratory-experiments-to-accompany-general-organic-and-biological-chemistry-an.pdf
    • http://www.gorillawalker.com/advance-music-jazz-conception-for-drums-book-and-cd.pdf
    • http://www.gorillawalker.com/peregrine-falcon-dive-dive-dive-blink-of-an-eye-superfast.pdf
    • http://www.gorillawalker.com/the-mathematical-way-of-thinking-the-world-of-mathematics.pdf
    • http://www.gorillawalker.com/cute-math-for-kids-geometry-interactive-color-quiz-e-book.pdf
    • http://www.gorillawalker.com/european-road-trip-journal-croatia-flag-cover-s-m-road.pdf
    • http://www.gorillawalker.com/there-will-always-be-rumors-loving-a-woman-is-like.pdf
    • http://www.gorillawalker.com/pakistan-a-dream-gone-sour-the-jubilee-series.pdf
    • http://www.gorillawalker.com/domain-decomposition-methods-algorithms-and-theory-springer-series-in-computational.pdf
    • http://www.gorillawalker.com/the-standard-encyclopedia-of-american-silverplate-flatware-and-hollow-ware.pdf
    • http://www.gorillawalker.com/the-pleasures-of-statistics-the-autobiography-of-frederick-mosteller.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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