Malicious PDF — malware analysis report

Static analysis result for SHA-256 191b0c3cc08cb29d…

MALICIOUS

PDF

42.6 KB Created: 2018-12-07 18:27:45 +03:00 Authoring application: Acrobat PDFMaker 5.0 for Word (via Acrobat Distiller 5.0 (Windows))
MD5: 10cf7be0dc40c7be8a2fd1af625dfdda SHA-1: b0af1c4101991e92914d1b98d1e47e286503748c SHA-256: 191b0c3cc08cb29d52343910ef9771d8c4d001448afb24171b5b4ea7f6818b55
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a machine learning classifier and contains a large number of external links, indicating a potential SEO manipulation or content distribution scheme. The embedded URLs point to various PDF documents hosted on gorillawalker.com. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific intent beyond link farming.

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/master-class-living-longer-stronger-and-happier-kindle-edition.pdf
    • http://www.gorillawalker.com/tragedia-de-numancia-cl-sicos-hisp-nicos-n-48-spanish.pdf
    • http://www.gorillawalker.com/egypt-yesterday-and-today.pdf
    • http://www.gorillawalker.com/joseph-priestley-and-the-discovery-of-oxygen-uncharted-unexplored-and.pdf
    • http://www.gorillawalker.com/coaching-soccer-tactics.pdf
    • http://www.gorillawalker.com/genetics-and-epithelial-cell-dysfunction-in-cystic-fibrosis-proceedings-of.pdf
    • http://www.gorillawalker.com/clinical-physiology-of-sleep-clinical-physiology-series.pdf
    • http://www.gorillawalker.com/the-crimea-with-a-visit-to-odessa.pdf
    • http://www.gorillawalker.com/skits-that-teach-lactose-free-for-those-who-can-t.pdf
    • http://www.gorillawalker.com/no-slouch.pdf
    • http://www.gorillawalker.com/partnering-with-parents.pdf
    • http://www.gorillawalker.com/like-judgment-day-the-ruin-and-redemption-of-a-town.pdf
    • http://www.gorillawalker.com/none-so-blind-a-short-story-collection.pdf
    • http://www.gorillawalker.com/the-classroom-and-the-cell-conversations-on-black-life-in.pdf
    • http://www.gorillawalker.com/the-killer-s-tears.pdf
    • http://www.gorillawalker.com/vancouver-island-and-british-columbia.pdf
    • http://www.gorillawalker.com/methodological-thinking-in-psychology-60-years-gone-astray-pb-advances.pdf
    • http://www.gorillawalker.com/digital-logic-circuit-design-korean-edition.pdf
    • http://www.gorillawalker.com/taken-by-the-vikings-gay-erotica.pdf
    • http://www.gorillawalker.com/animal-dentistry-and-diseases-of-the-mouth-veterinary-surgery-volume.pdf
    • http://www.gorillawalker.com/the-jacobites-and-their-drinking-glasses.pdf
    • http://www.gorillawalker.com/philosophy-of-science-teach-yourself.pdf
    • http://www.gorillawalker.com/computadoras-para-todos-3a-edici-n-edici-n-ampliada-con.pdf
    • http://www.gorillawalker.com/magic-and-mystery-of-scotland.pdf
    • http://www.gorillawalker.com/on-combat-the-psychology-and-physiology-of-deadly-conflict-in.pdf
    • http://www.gorillawalker.com/vox-compact-spanish-and-english-dictionary-third-edition-paperback-vox.pdf
    • http://www.gorillawalker.com/baptism-by-fire-eight-presidents-who-took-office-in-times.pdf
    • http://www.gorillawalker.com/sexy-cowgirls-a-picture-book-kindle-edition.pdf
    • http://www.gorillawalker.com/ludwig-van-beethoven-complete-string-quartets.pdf
    • http://www.gorillawalker.com/pulse-electric-current-synthesis-and-processing-of-materials-ceramic-transactions.pdf
    • http://www.gorillawalker.com/the-dance-music-of-ireland-1001-gems.pdf
    • http://www.gorillawalker.com/lippincott-s-review-series-fluids-and-electrolytes-book-with-cd.pdf
    • http://www.gorillawalker.com/alexander-s-buses-remembered-1945-1961-v-1.pdf
    • http://www.gorillawalker.com/bildgebende-verfahren-in-der-medizin-von-der-technik-zur-medizinischen.pdf
    • http://www.gorillawalker.com/l-italiano-con-le-parole-crociate-crossword-puzzle-book-3.pdf
    • http://www.gorillawalker.com/organ-concerto-no-ii-in-a-minor-bwv-593-for.pdf
    • http://www.gorillawalker.com/dahn-yoga-basics.pdf
    • http://www.gorillawalker.com/the-question-of-being.pdf
    • http://www.gorillawalker.com/the-peacemakers.pdf
    • http://www.gorillawalker.com/confessions-of-a-serial-dieter.pdf
    • http://www.gorillawalke
    • 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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