Malicious PDF — malware analysis report

Static analysis result for SHA-256 a623ddb6bd366b34…

MALICIOUS

PDF

14.8 KB Created: 2019-05-02 18:58:56 +01:00 Authoring application: mPDF 5.7
MD5: aab69681c30d0b2f7359055b242d025b SHA-1: 5367c92004493ad58f0990f33c0aa2e5107620c2 SHA-256: a623ddb6bd366b34cb8a9e1ef8048ca85c96c738d134f8fb80d39cbd748ec38d
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the PDF structure and link farm heuristic suggest the primary purpose is to redirect users to potentially harmful content hosted on the `xiixmcuin.linkpc.net` domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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://xiixmcuin.linkpc.net/1201206206203205/The-Bristling-Wood-Deverry-3-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/1203208200203208/Darkspell-Deverry-2-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/3200204201200205/Daggerspell-Deverry-1-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/4201200200206202/A-Time-of-Omens-Deverry-6-The-Westlands-2-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/7201201204201/The-Red-Wyvern-Deverry-9-The-Dragon-Mage-1-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/4200209206207200/A-Time-of-Exile-Deverry-5-Westlands-1-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/3207202209202207/The-Shadow-Isle-Deverry-14-The-Dragon-Mage-6-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/7207208209209/The-Fire-Dragon-Deverry-11-Dragon-Mage-3-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/3207202209202206/The-Silver-Mage-Deverry-15-The-Dragon-Mage-7-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/7209201209203/The-Silver-Mage-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/1206204206208204/Freeze-Frames-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/1201206207202205/Days-of-Air-and-Darkness-The-Westlands-4-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/1201206206208203/A-Time-of-Omens-The-Westlands-2-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/1201206206208202/Days-of-Blood-and-Fire-The-Westlands-3-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/2208203201202206/License-to-Ensorcell-Nola-O-Grady-1-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/2200209200205209/The-Gold-Falcon-The-Silver-Wyrm-1-The-Dragon-Mage-4-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/1206204206209203/Polar-City-Blues-Polar-City-1-by-Katharine-Kerr.pdf
    • http://xiixmcuin.linkpc.net/5204204208206204/Norwegian-Wood-Chopping-Stacking-and-Drying-Wood-the-Scandinavian-Way-by-Lars-Mytting.pdf
    • http://xiixmcuin.linkpc.net/3201201209205203/Merlin-s-Wood-Mythago-Wood-5-by-Robert-Holdstock.pdf
    • http://xiixmcuin.linkpc.net/6205203207202200/Judith-Kerr-s-Creatures-by-Judith-Kerr.pdf

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