Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5abd25600d263b…

MALICIOUS

PDF

35.6 KB Created: 2019-11-10 05:16:40 +03:00 Authoring application: Microsoft® Word 2016
MD5: 2218145eb66aa008074bed3cc80924fd SHA-1: 642d1ce2c908f48f48a545f6e30a66a1676bc90e SHA-256: 5b5abd25600d263b7cb406151ba924fce8dd3adf9ce0d4e01766a988c06ce448
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malware. ClamAV detected this file as Pdf.Dropper.Agent-7413877-0, and an ML classifier also flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and the heuristic firings strongly suggest a malicious dropper intended to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8477

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-7413877-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7413877-0
  • 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/a-short-history-of-scotland-illustrated.pdf
    • http://www.gorillawalker.com/supplementary-essays-on-the-cause-and-prevention-of-dental-caries.pdf
    • http://www.gorillawalker.com/exhibiting-the-empire-cultures-of-display-and-the-british-empire.pdf
    • http://www.gorillawalker.com/final-memoranda-major-general-ralph-h-van-deman-usa-ret.pdf
    • http://www.gorillawalker.com/marriage-law-as-affecting-the-church-a-paper-read-at.pdf
    • http://www.gorillawalker.com/will-write-for-food-the-complete-guide-to-writing-cookbooks.pdf
    • http://www.gorillawalker.com/security-analysis-on-wall-street-a-comprehensive-guide-to-today.pdf
    • http://www.gorillawalker.com/love-of-dog-1960-s-and-70-s-baby-boomer.pdf
    • http://www.gorillawalker.com/recreational-bicycle-trails-of-minnesota.pdf
    • http://www.gorillawalker.com/what-your-doctory-may-not-tell-you-about-menopause.pdf
    • http://www.gorillawalker.com/biblical-principles-of-sex-ministry-monographs-for-modern-times.pdf
    • http://www.gorillawalker.com/run-faster-from-the-5k-to-the-marathon-how-to.pdf
    • http://www.gorillawalker.com/theory-of-operator-algebras-iii-encyclopaedia-of-mathematical-sciences.pdf
    • http://www.gorillawalker.com/midnight-s-jewel-siren-publishing-classic.pdf
    • http://www.gorillawalker.com/rigby-on-our-way-to-english-small-book-6pk-grade.pdf
    • http://www.gorillawalker.com/oxford-dictionary-of-humorous-quotations-oxford-paperback-reference.pdf
    • http://www.gorillawalker.com/jurisdiction-of-pastors-in-the-external-forum-1957-cua-studies.pdf
    • http://www.gorillawalker.com/the-crown-of-ireland-research-papers-in-irish-studies.pdf
    • http://www.gorillawalker.com/les-parois-de-verre-de-la-defense-photos-des-parois.pdf
    • http://www.gorillawalker.com/the-locker-room-fantasy-by-laylani-starxxx-chapter-1.pdf
    • http://www.gorillawalker.com/getting-into-medical-school-2013-entry-by-horner-simon-17th.pdf
    • http://www.gorillawalker.com/residence-options-for-older-and-disabled-clients.pdf
    • http://www.gorillawalker.com/paul-missionary-theologian-a-survey-of-his-missionary-labours-and.pdf
    • http://www.gorillawalker.com/acne-sucks-the-diy-acne-recipes-and-skin-recipes-you.pdf
    • http://www.gorillawalker.com/a-curious-history-of-food-and-drink.pdf
    • http://www.gorillawalker.com/dragon-dawn-dinosaurian-time-travel-book-1-kindle-edition.pdf
    • http://www.gorillawalker.com/brazilian-street-party-food-favorites-getting-you-ready-for-the.pdf
    • http://www.gorillawalker.com/cursed-by-destiny-a-weird-girls-novel.pdf
    • http://www.gorillawalker.com/dreamweavers-kindle-edition.pdf
    • http://www.gorillawalker.com/the-wild-alliance-awakening-your-inner-angel-sidhe.pdf
    • http://www.gorillawalker.com/la-religion-de-l-avenir-french-edition.pdf
    • http://www.gorillawalker.com/herbie-brennan-s-forbidden-truths-strange-powers-of-the-human.pdf
    • http://www.gorillawalker.com/recombinatorics-the-algorithmics-of-ancestral-recombination-graphs-and-explicit-phylogenetic.pdf
    • http://www.gorillawalker.com/love-only-once-malory-family-series.pdf
    • http://www.gorillawalker.com/turkey-a-traveller-s-historical-and-architectural-guide.pdf
    • http://www.gorillawalker.com/the-new-iranian-leadership-ahmadinejad-terrorism-nuclear-ambition-and-the.pdf
    • http://www.gorillawalker.com/finding-1-stocks-screening-backtesting-and-time-proven-strategies.pdf
    • http://www.gorillawalker.com/the-dangerous-game-anders-knutas-series-8.pdf
    • http://www.gorillawalker.com/statistical-abstract-of-the-united-states-2012-the-national-data.pdf
    • http://www.gorillawalker.com/keyboard-guide.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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