Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ab8726c510e73d…

MALICIOUS

PDF

42.6 KB Created: 2018-11-23 08:01:08 +03:00 Authoring application: calibre 0.9.10 [http://calibre-ebook.com] (via PoDoFo - http://podofo.sf.net)
MD5: c30fa681e9afe5901dda8cefdd9d80c3 SHA-1: 855200c61a2903de29a5e31f5b88d1617a91e0f4 SHA-256: 63ab8726c510e73dd9d088ad30fb543b34685523c3011a011e1fbf7e7ad2e40a
152 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 is indicative of a link farm or a method to distribute or mask malicious content. ClamAV detected this as Pdf.Dropper.Agent, suggesting it's designed to drop or facilitate the execution of other malware. The ML classifier also flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7266886-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7266886-0
  • 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/black-arabia-the-african-origin-of-islam.pdf
    • http://www.gorillawalker.com/me-against-my-brother-at-war-in-somalia-sudan-and.pdf
    • http://www.gorillawalker.com/gann-masters-ii.pdf
    • http://www.gorillawalker.com/from-gettysburg-to-golan-how-two-great-battles-were-won.pdf
    • http://www.gorillawalker.com/limitation-periods-litigation-library.pdf
    • http://www.gorillawalker.com/guardians-the-fallout-the-guardians-series-book-2-kindle-edition.pdf
    • http://www.gorillawalker.com/where-is-the-mango-princess-a-journey-back-from-brain.pdf
    • http://www.gorillawalker.com/a-constitution-for-all-times-boston-review-books.pdf
    • http://www.gorillawalker.com/el-ments-de-th-orie-des-graphes-collection-iris-french.pdf
    • http://www.gorillawalker.com/dark-matter-in-astro-and-particle-physics-proceedings-of-the.pdf
    • http://www.gorillawalker.com/minor-bodies-of-the-solar-system-holt-earth-science-chapter.pdf
    • http://www.gorillawalker.com/yamaha-outboards-1-2-cylinders-1984-1991-seloc-marine-tune.pdf
    • http://www.gorillawalker.com/blighted-empire-warhammer-time-of-legends.pdf
    • http://www.gorillawalker.com/the-advantage-of-real-estate.pdf
    • http://www.gorillawalker.com/dumka-score-and-parts.pdf
    • http://www.gorillawalker.com/the-birth-life-and-death-of-scaramouch.pdf
    • http://www.gorillawalker.com/the-world-we-re-in.pdf
    • http://www.gorillawalker.com/bringing-the-rain-to-kapiti-plain-reading-rainbow-books.pdf
    • http://www.gorillawalker.com/diagnostic-battery-of-charles-manson-kindle-edition.pdf
    • http://www.gorillawalker.com/starling-love-in-los-angeles.pdf
    • http://www.gorillawalker.com/nature-in-aquarelle-wall-calendar-2016-scenic-calendar-artistry-calendar.pdf
    • http://www.gorillawalker.com/like-no-other-the-life-of-christ-member-book-bible.pdf
    • http://www.gorillawalker.com/night-wanderer-the-a-native-gothic-novel-kindle-edition.pdf
    • http://www.gorillawalker.com/strangers-below-primitive-baptists-and-american-culture.pdf
    • http://www.gorillawalker.com/explaining-criminal-justice-community-theory-and-criminal-justice-reform.pdf
    • http://www.gorillawalker.com/the-danger-tree-memory-war-and-the-search-for-a.pdf
    • http://www.gorillawalker.com/treating-the-field-as-a-lab-a-baisc-guide-to.pdf
    • http://www.gorillawalker.com/jon-secada-heart-soul-a-voice-piano-vocal-chords.pdf
    • http://www.gorillawalker.com/aloha-betrayed-native-hawaiian-resistance-to-american-colonialism-a-john.pdf
    • http://www.gorillawalker.com/mathematics-for-elementary-school-teachers-a-conceptual-approach.pdf
    • http://www.gorillawalker.com/of-poverty-and-plastic-scavenging-and-scrap-trading-entrepreneurs-in.pdf
    • http://www.gorillawalker.com/the-great-book-of-sausages.pdf
    • http://www.gorillawalker.com/miners-and-the-state-in-the-ottoman-empire-the-zonguldak.pdf
    • http://www.gorillawalker.com/iec-60115-9-1-ed-1-0-en-2003-fixed.pdf
    • http://www.gorillawalker.com/meanwhile-back-at-the-ranch.pdf
    • http://www.gorillawalker.com/time-out-hong-kong-time-out-guides.pdf
    • http://www.gorillawalker.com/autocourse-the-world-s-leading-grand-prix-annual-2001-2002.pdf
    • http://www.gorillawalker.com/frank-erickson-high-school-band-course-3rd-french-horn-texas.pdf
    • http://www.gorillawalker.com/masquerade-eververse-book-4.pdf
    • http://www.gorillawalker.com/easy-automated-trading-simplified-coding-for-metatrader-4.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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