Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f678604438618f7…

MALICIOUS

PDF

42.9 KB Created: 2019-03-17 01:40:15 +03:00 Authoring application: doPDF Ver 7.1 Build 349 (Windows XP Professional Edition (SP 3) - Version: 5.1.2600 (x86))
MD5: 11132596b9eb3fb3f9eda9e81393d2b6 SHA-1: 71d98e2cc8a2eb8b440c584a3ced56faa370ee20 SHA-256: 8f678604438618f7437852b7a746e5c0b80d8e400e7d01005d100b2a3d71bf4c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

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. The primary attack pattern appears to be a link farm, likely used for SEO manipulation or to distribute additional malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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/introduction-to-agricultural-engineering-technology-a-problem-solving-approach.pdf
    • http://www.gorillawalker.com/u-s-immigration-cartoon-nation.pdf
    • http://www.gorillawalker.com/wake-up-america-world-war-i-and-the-american-poster.pdf
    • http://www.gorillawalker.com/act-like-a-lady-think-like-a-boss-motivational-quotes.pdf
    • http://www.gorillawalker.com/horny-turkish-delights.pdf
    • http://www.gorillawalker.com/choosing-the-right-daw-for-you-take-the-guesswork-out.pdf
    • http://www.gorillawalker.com/practical-fracture-mechanics-in-design-mechanical-engineering-marcel-dekker-hardcover.pdf
    • http://www.gorillawalker.com/the-exile-ryan-kealey-series.pdf
    • http://www.gorillawalker.com/jacob-s-wake.pdf
    • http://www.gorillawalker.com/american-style.pdf
    • http://www.gorillawalker.com/recorder-practice-book-music-3-for-christian-schools.pdf
    • http://www.gorillawalker.com/addicted-to-angling-a-lifetime-s-obsession-with-fish-and.pdf
    • http://www.gorillawalker.com/chiapanecas-mexican-clap-dance-score-parts.pdf
    • http://www.gorillawalker.com/barbershops-bibles-and-bet-everyday-talk-and-black-political-thought.pdf
    • http://www.gorillawalker.com/king-of-beaver-island.pdf
    • http://www.gorillawalker.com/if-angels-burn-a-novel-of-the-darkyn.pdf
    • http://www.gorillawalker.com/how-to-find-old-la-a-guide-to-the-usual.pdf
    • http://www.gorillawalker.com/mozart-for-oboe-book-with-cd.pdf
    • http://www.gorillawalker.com/easy-to-play-israeli-jewish-song-hits-israeli-jewish-songbooks.pdf
    • http://www.gorillawalker.com/prentice-hall-writers-companion-middle-grades-student-text.pdf
    • http://www.gorillawalker.com/ingredients-webster-s-specialty-crossword-puzzles.pdf
    • http://www.gorillawalker.com/babyface-a-collection-of-his-greatest-hits-piano-vocal-guitar.pdf
    • http://www.gorillawalker.com/the-truth-about-adhd-and-other-neurobiological-disorders.pdf
    • http://www.gorillawalker.com/fun-parties-for-fun-kids.pdf
    • http://www.gorillawalker.com/lever-of-empire-the-international-gold-standard-and-the-crisis.pdf
    • http://www.gorillawalker.com/iron-war-dave-scott-mark-allen-the-greatest-race-ever.pdf
    • http://www.gorillawalker.com/traits-of-a-lasting-marriage-what-strong-marriages-have-in.pdf
    • http://www.gorillawalker.com/unbelievable-sex-5-story-erotica-bundle-vampire-werewolf-shifter-mummy.pdf
    • http://www.gorillawalker.com/oral-surgery-a-text-book-on-general-medicine-and-surgery.pdf
    • http://www.gorillawalker.com/hackers-toeic-start-reading-for-korean-speakers-by-david-cho.pdf
    • http://www.gorillawalker.com/stem-cell-therapies-opportunities-for-ensuring-the-quality-and-safety.pdf
    • http://www.gorillawalker.com/wood-destroying-insects-wood-borers-and-termites.pdf
    • http://www.gorillawalker.com/methods-in-psychological-research.pdf
    • http://www.gorillawalker.com/assessing-communication-education-a-handbook-for-media-speech-and-theatre.pdf
    • http://www.gorillawalker.com/god-s-business-balancing-faith-and-the-bottom-line.pdf
    • http://www.gorillawalker.com/psychiatric-care-in-the-nursing-home-1st-first-edition.pdf
    • http://www.gorillawalker.com/troubleshooting-electrical-electronic-systems-workbook.pdf
    • http://www.gorillawalker.com/un-fils-inattendu-french-edition.pdf
    • http://www.gorillawalker.com/premarital-counseling.pdf
    • http://www.gorillawalker.com/creating-family-harmony-through-tanka.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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