Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fa7151a4681898…

MALICIOUS

PDF

45.4 KB Created: 2019-03-18 02:04:28 +03:00 Authoring application: Adobe Acrobat 6.02 (via Adobe Acrobat 6.02 Paper Capture Plug-in)
MD5: 4c835a26870437e6124a03798b0d0f60 SHA-1: c6d2750f90bae0248002d0fc41f5c54d679e4923 SHA-256: 99fa7151a46818984ce397e68a246fd3777cfd19ae2b6e421c0ed30c5ee2d6f7
90 Risk Score

Malware Insights

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

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 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 link farm or redirection tactic to host malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8812

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/discover-ancient-egypt-a-carnegie-activity-book-carnegie-museum-discovery.pdf
    • http://www.gorillawalker.com/a-software-engineer-learns-html5-javascript-and-jquery-a-guide.pdf
    • http://www.gorillawalker.com/adhesive-dental-materials-for-reinforcing-weakened-root-structure.pdf
    • http://www.gorillawalker.com/from-dr-mather-to-dr-seuss-200-years-of-american.pdf
    • http://www.gorillawalker.com/catholic-traditions-in-cooking.pdf
    • http://www.gorillawalker.com/i-have-eczema-coping-with-chronic-conditions-for-preschoolers-volume.pdf
    • http://www.gorillawalker.com/mel-bay-presents-solos-for-soprano-recorder-collection-1-african.pdf
    • http://www.gorillawalker.com/lo-que-dicen-tus-ojos-spanish-edition.pdf
    • http://www.gorillawalker.com/her-blood-is-gold-celebrating-the-power-of-menstruation.pdf
    • http://www.gorillawalker.com/new-decorator.pdf
    • http://www.gorillawalker.com/how-to-learn-to-dance-in-colombia.pdf
    • http://www.gorillawalker.com/called-to-be-amish-my-journey-from-head-majorette-to.pdf
    • http://www.gorillawalker.com/the-forgotten-players-the-story-of-black-baseball-in-america.pdf
    • http://www.gorillawalker.com/the-seduction-of-braulio-jules-life-and-death-series.pdf
    • http://www.gorillawalker.com/entertainment-law-04-by-edwards-leah-k-helewitz-jeffrey-paperback.pdf
    • http://www.gorillawalker.com/atlas-indonesia-buku-pertama-umum.pdf
    • http://www.gorillawalker.com/berger-v-chase-nat-bank-of-city-of-new-york.pdf
    • http://www.gorillawalker.com/introduction-to-remote-sensing-third-edition.pdf
    • http://www.gorillawalker.com/the-striped-bass-60-pound-club.pdf
    • http://www.gorillawalker.com/write-source-interactive-writing-skills-cd-rom-grade-8-2004.pdf
    • http://www.gorillawalker.com/massachusetts-off-the-beaten-path-a-guide-to-unique-places.pdf
    • http://www.gorillawalker.com/the-reports-of-the-magicians-and-astrologers-of-nineveh-and.pdf
    • http://www.gorillawalker.com/the-montignac-diet-cookbook.pdf
    • http://www.gorillawalker.com/miami-florida-travel-guide-miss-passport-city-guides-presents-mini.pdf
    • http://www.gorillawalker.com/the-traveler-s-guide-to-the-most-scenic-roads-in.pdf
    • http://www.gorillawalker.com/visual-perception-of-music-notation.pdf
    • http://www.gorillawalker.com/malcolm-x-the-last-speeches-malcolm-x-speeches-writings.pdf
    • http://www.gorillawalker.com/year-in-nam-a-native-american-soldier-s-story-north.pdf
    • http://www.gorillawalker.com/the-everything-guide-to-study-skills-strategies-tips-and-tools.pdf
    • http://www.gorillawalker.com/first-meetings-in-ender-s-universe-other-tales-from-the.pdf
    • http://www.gorillawalker.com/cliff-may-and-the-modern-ranch-house.pdf
    • http://www.gorillawalker.com/the-asceticism-of-isaac-of-nineveh-oxford-early-christian-studies.pdf
    • http://www.gorillawalker.com/pathfinder-adventure-path-kingmaker-part-6-sound-of-a-thousand.pdf
    • http://www.gorillawalker.com/debussy-claude-beau-soir-for-violin-and-piano-arranged-by.pdf
    • http://www.gorillawalker.com/genes-and-disease-cancers-kindle-edition.pdf
    • http://www.gorillawalker.com/lance-corporal-adolf-hitler-world-war-one-soldier-kindle-edition.pdf
    • http://www.gorillawalker.com/essays-on-the-constitution-of-the-united-states-published-during.pdf
    • http://www.gorillawalker.com/arabic-manual-a-colloquial-handbook-in-the-syrian-dialect-for.pdf
    • http://www.gorillawalker.com/a-little-revenge-benjamin-franklin-and-his-son.pdf
    • http://www.gorillawalker.com/fletch-s-fortune.pdf
    • http://www.gorillawalker.com/i-have-eczema-coping-with-chronic-condi
    • 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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