Malicious PDF — malware analysis report

Static analysis result for SHA-256 6951215108571380…

MALICIOUS

PDF

40.5 KB Created: 2019-03-17 04:21:23 +03:00 Authoring application: calibre 0.9.31 [http://calibre-ebook.com]
MD5: cba9da76d338f1aaf2c1ebb9c2e45ff0 SHA-1: 12bf5794632f1cdd2e532dcecc4cbbe3c3d95ab9 SHA-256: 69512151085713801874c6ea3441b11c0369ff464b4fd1edfee11f9836eb11a0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 the document as malicious. While no scripts were extracted, the sheer volume of links suggests an attempt to manipulate search engine rankings or distribute potentially malicious content via these linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9526

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/puppetry-clip-art.pdf
    • http://www.gorillawalker.com/medical-informatics-in-enlarged-europe-proceedings-of-the-european-federation.pdf
    • http://www.gorillawalker.com/psychiatry-and-philosophy-of-science-philosophy-and-science.pdf
    • http://www.gorillawalker.com/essentials-of-cookery-cereals-bread-hot-breads-woman-s-institutelibrary.pdf
    • http://www.gorillawalker.com/terminator-salvation-the-official-companion.pdf
    • http://www.gorillawalker.com/stock-market-logic-a-sophisticated-approach-to-profits-on-wall.pdf
    • http://www.gorillawalker.com/essential-oils-a-beginner-s-guide-to-natural-cures-with.pdf
    • http://www.gorillawalker.com/comparative-qsar.pdf
    • http://www.gorillawalker.com/the-artist-s-safari-capturing-africa-with-pen-lens-and.pdf
    • http://www.gorillawalker.com/the-melanesians-studies-in-their-anthropology-and-folk-lore.pdf
    • http://www.gorillawalker.com/the-poor-children-digital.pdf
    • http://www.gorillawalker.com/optimization-in-practice-with-matlab-for-engineering-students-and-professionals.pdf
    • http://www.gorillawalker.com/immunology-of-the-gut-proceedings-ciba-foundation-symposium-new-ser.pdf
    • http://www.gorillawalker.com/the-festal-menaion.pdf
    • http://www.gorillawalker.com/handbook-of-thermoplastic-elastomers-second-edition-plastics-design-library.pdf
    • http://www.gorillawalker.com/the-escape-factory-the-story-of-mis-x-the-super.pdf
    • http://www.gorillawalker.com/jake-is-gay-paperback.pdf
    • http://www.gorillawalker.com/microbiology-isbn-9780805327328.pdf
    • http://www.gorillawalker.com/working-with-anxious-nervous-and-depressed-children-a-spiritual-perspective.pdf
    • http://www.gorillawalker.com/the-nazis-next-door-how-america-became-a-safe-haven.pdf
    • http://www.gorillawalker.com/the-spiritual-laws-of-life.pdf
    • http://www.gorillawalker.com/little-baby-grief-kindle-edition.pdf
    • http://www.gorillawalker.com/attack-of-the-girlzillas-the-barftastic-life-of-louie-burger.pdf
    • http://www.gorillawalker.com/the-yale-book-of-quotations.pdf
    • http://www.gorillawalker.com/write-a-screenplay-every-60-days-from-concept-to-production.pdf
    • http://www.gorillawalker.com/introduction-to-embedded-systems-using-ansi-c-and-the-arduino.pdf
    • http://www.gorillawalker.com/the-encyclopedia-of-franchises-and-franchising.pdf
    • http://www.gorillawalker.com/integrating-computer-technology-into-the-classroom.pdf
    • http://www.gorillawalker.com/c-mo-solicitar-su-propio-divorcio-how-to-file-your.pdf
    • http://www.gorillawalker.com/a-book-of-zen-sayings-haiku-koans.pdf
    • http://www.gorillawalker.com/edgar-allan-poe-collection-the-black-cat-the-gold-bug.pdf
    • http://www.gorillawalker.com/di-pizza-e-pizzerie-capitolo-8-la-cottura-italian-edition.pdf
    • http://www.gorillawalker.com/order-of-christian-funerals-ritual-de-exequias-cristianas-vigil-service.pdf
    • http://www.gorillawalker.com/coordinating-community-responses-to-domestic-violence-lessons-from-duluth-and.pdf
    • http://www.gorillawalker.com/year-of-the-hangman.pdf
    • http://www.gorillawalker.com/bejeweled-the-dazzling-unofficial-game-guide-hints-tips-and-strategies.pdf
    • http://www.gorillawalker.com/white-wave-a-chinese-tale.pdf
    • http://www.gorillawalker.com/corinthians-o-time-do-povo-portuguese-edition.pdf
    • http://www.gorillawalker.com/the-1-windfall-how-successful-companies-use-price-to-profit.pdf
    • http://www.gorillawalker.com/tokyo-from-edo-to-showa-1867-1989-the-emergence-of.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://calibre-ebook.com
    • 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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