Malicious PDF — malware analysis report

Static analysis result for SHA-256 1723cb1ddb1ea67f…

MALICIOUS

PDF

39.1 KB Created: 2019-03-18 02:05:13 +03:00 Authoring application: QuarkXPressª: LaserWriter 8 8.5.1 (via Acrobat Distiller 3.01 for Power Macintosh)
MD5: 8c647834aec018d87a47d35ed180c677 SHA-1: f8b8be7e9d552b2978f604d8edca63979f9beb65 SHA-256: 1723cb1ddb1ea67fb4a4966667a66100719fd0195b5abcb8ea87fb40c5631960
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files on the domain 'gorillawalker.com'. This behavior is indicative of a link farm, likely used for SEO manipulation or to distribute a payload. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious or unwanted content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8505

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/a-passion-redeemed-the-daughters-of-boston-book-2-bk.pdf
    • http://www.gorillawalker.com/life-skill-academics-math.pdf
    • http://www.gorillawalker.com/columbus-and-the-age-of-discovery.pdf
    • http://www.gorillawalker.com/math-common-core-4th-grade.pdf
    • http://www.gorillawalker.com/drumming-at-the-edge-of-magic-a-journey-into-the.pdf
    • http://www.gorillawalker.com/the-international-journal-of-health-wellness-and-society-volume-1.pdf
    • http://www.gorillawalker.com/the-friendship-riddle.pdf
    • http://www.gorillawalker.com/help-with-high-impact-presentations.pdf
    • http://www.gorillawalker.com/batman-dead-white.pdf
    • http://www.gorillawalker.com/aboriginal-tribes-of-india-and-pakistan-the-bhils-kolhis-primary.pdf
    • http://www.gorillawalker.com/progress-in-behavioral-studies-volume-1.pdf
    • http://www.gorillawalker.com/quick-easy-menus-more-than-130-low-fat-recipes-weight.pdf
    • http://www.gorillawalker.com/ultrametric-calculus-an-introduction-to-p-adic-analysis-cambridge-studies.pdf
    • http://www.gorillawalker.com/mcdonnell-douglas-md-80-airline-markings-vol-8.pdf
    • http://www.gorillawalker.com/dear-mom.pdf
    • http://www.gorillawalker.com/practical-ophthalmology-a-manual-for-beginning-residents.pdf
    • http://www.gorillawalker.com/the-grouse-of-the-world.pdf
    • http://www.gorillawalker.com/linear-second-order-elliptic-operators.pdf
    • http://www.gorillawalker.com/heart-of-the-flame-dragon-chalice-series-the-dragon-chalice.pdf
    • http://www.gorillawalker.com/holy-bible.pdf
    • http://www.gorillawalker.com/little-miss-overshare-a-parody-little-miss-and-mr-me.pdf
    • http://www.gorillawalker.com/jack-knifed-kindle-edition.pdf
    • http://www.gorillawalker.com/reading-2007-grammar-and-writing-practice-book-grade-1-reading.pdf
    • http://www.gorillawalker.com/meehan-and-sharpe-on-appellate-advocacy.pdf
    • http://www.gorillawalker.com/the-ultimate-peach-cobbler-recipe-just-like-grandma-s-kindle.pdf
    • http://www.gorillawalker.com/singing-from-the-floor-a-history-of-british-folk-clubs.pdf
    • http://www.gorillawalker.com/one-stop-doc-cell-and-molecular-biology.pdf
    • http://www.gorillawalker.com/knit-your-own-pet-easy-to-follow-patterns-for-beginners.pdf
    • http://www.gorillawalker.com/literature-guide-mr-popper-s-penguins-grades-4-8.pdf
    • http://www.gorillawalker.com/antipodean-ark.pdf
    • http://www.gorillawalker.com/test-bank-for-essential-biology-and-essential-biology-with-physiology.pdf
    • http://www.gorillawalker.com/funk-disco-horn-section-transcribed-scores.pdf
    • http://www.gorillawalker.com/silver-s-titters-37-short-stories-of-life-in-snow.pdf
    • http://www.gorillawalker.com/what-mad-pursuit-a-personal-view-of-scientific-discovery.pdf
    • http://www.gorillawalker.com/jazz-dance-the-story-of-american-vernacular-dance.pdf
    • http://www.gorillawalker.com/god-have-you-got-it-all-together.pdf
    • http://www.gorillawalker.com/when-the-stakes-are-too-high.pdf
    • http://www.gorillawalker.com/phenomenology-critical-concepts-in-philosophy.pdf
    • http://www.gorillawalker.com/sticker-style-shop.pdf
    • http://www.gorillawalker.com/the-1991-j-r-r-tolkien-calendar.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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