Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f403acc1be80c46…

MALICIOUS

PDF

45.9 KB Created: 2018-12-08 04:19:33 +03:00 Authoring application: calibre 0.9.2 [http://calibre-ebook.com] (via PoDoFo - http://podofo.sf.net)
MD5: 7faa9236997df7e373508abf4b75c05b SHA-1: 9545eb7d5c6c6ceda6307737532dbc88e007ae4a SHA-256: 8f403acc1be80c46b0a88a95acfcd0515dfe35b7bbc92a34d12f77fb3cf72c4e
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, 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 poisoning or redirecting users to phishing or malware sites. The primary attack pattern involves leveraging these links to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8974

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/naked-shall-i-return-a-ross-duncan-novel.pdf
    • http://www.gorillawalker.com/fr-d-ric-malle-on-perfume-making.pdf
    • http://www.gorillawalker.com/volunteer-subject-wiley-series-on-personality-processes.pdf
    • http://www.gorillawalker.com/starting-your-career-as-a-graphic-designer.pdf
    • http://www.gorillawalker.com/a-to-z-of-classic-hollywood-style.pdf
    • http://www.gorillawalker.com/homeskills-building-decks-all-the-information-you-need-to-design.pdf
    • http://www.gorillawalker.com/advances-in-scattering-and-biomedical-engineering-proceedings-of-the-6th.pdf
    • http://www.gorillawalker.com/round-the-world-cooking-library-german-cooking.pdf
    • http://www.gorillawalker.com/the-mouth-and-nose-in-3d-the-human-body-in.pdf
    • http://www.gorillawalker.com/living-along-the-autism-spectrum-what-does-it-mean-to.pdf
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    • http://www.gorillawalker.com/bacillus-of-beauty-a-romance-of-today.pdf
    • http://www.gorillawalker.com/eyewitness-matter-eyewitness-books.pdf
    • http://www.gorillawalker.com/how-to-piss-off-a-dragon-book-one.pdf
    • http://www.gorillawalker.com/diagnostic-electron-microscopy-a-practical-guide-to-tissue-preparation-and.pdf
    • http://www.gorillawalker.com/materials-science-in-manufacturing.pdf
    • http://www.gorillawalker.com/the-melancholy-of-haruhi-suzumiya-vol-14-manga.pdf
    • http://www.gorillawalker.com/savvy-success-achieving-professional-excellence-and-career-satisfaction-in-the.pdf
    • http://www.gorillawalker.com/chicken-soup-for-the-soul-conversation-starters-to-open-the.pdf
    • http://www.gorillawalker.com/dallas-rockvam-heads-rockvam-interview-an-article-from-thrasher-html.pdf
    • http://www.gorillawalker.com/lift-every-voice-and-sing-st-louis-african-americans-in.pdf
    • http://www.gorillawalker.com/kentucky-bingo-biography-edition.pdf
    • http://www.gorillawalker.com/bandits-prophets-and-messiahs-popular-movements-at-the-time-of.pdf
    • http://www.gorillawalker.com/reader-s-digest-family-health-guide-and-medical-encyclopedia.pdf
    • http://www.gorillawalker.com/value-creation-in-middle-market-private-equity.pdf
    • http://www.gorillawalker.com/introduction-to-mathematical-logic-the-appleton-century-mathematics-series.pdf
    • http://www.gorillawalker.com/knitting-winter-fashion-39-models-and-accessories-to-knit-fashion.pdf
    • http://www.gorillawalker.com/general-history-of-africa-the-african-slave-trade-from-the.pdf
    • http://www.gorillawalker.com/the-wpa-guide-to-1930s-arizona.pdf
    • http://www.gorillawalker.com/from-slavery-to-freedom-third-edition-a-history-of-negro.pdf
    • http://www.gorillawalker.com/early-fiction-in-england.pdf
    • http://www.gorillawalker.com/a-sequence-for-academic-writing-6th-edition.pdf
    • http://www.gorillawalker.com/texts-and-tips-for-spiritual-directors-and-for-personal-prayer.pdf
    • http://www.gorillawalker.com/a-little-book-about-believing-the-transformative-healing-power-of.pdf
    • http://www.gorillawalker.com/the-german-roots-of-nineteenth-century-american-theology.pdf
    • http://www.gorillawalker.com/black-memorabilia-around-the-house-a-handbook-and-price-guide.pdf
    • http://www.gorillawalker.com/perspectives-on-american-politics.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://podofo.sf.net
    • 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#
    +1 more URL(s)

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