Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea88703b9fd98cf…

MALICIOUS

PDF

15.7 KB Created: 2019-05-07 04:17:20 +01:00 Authoring application: mPDF 5.7
MD5: abc94d92edbe32237883367d09bee1ba SHA-1: 6fd7d2b9e017ea826e416e2fe4b9cc7aa5b4770a SHA-256: bea88703b9fd98cf790745d1bf33b652c637cb4e3020e6ccf291c618ad0ba671
90 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a large number of embedded external links, indicative of a link farm or distribution mechanism. The primary heuristic, PDF_SEO_LINK_FARM, confirms the presence of numerous links, with the first identified URL being http://muicuiu.dumb1.com/1a07a00a08a04a09/The-Book-of-Em-The-Last-Gatekeeper-by-Richard-Brant.pdf. No scripts were extracted from this sample. The document body was unreadable, but the link farm suggests a malicious intent to redirect users or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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://muicuiu.dumb1.com/1a07a00a08a04a09/The-Book-of-Em-The-Last-Gatekeeper-by-Richard-Brant.pdf
    • http://muicuiu.dumb1.com/1a00a07a03a09a08/The-Gatekeeper-The-Gatekeeper-1-by-Richard-Blackburn.pdf
    • http://muicuiu.dumb1.com/1a06a02a04a03a07/Begin-Anew-The-New-Day-1-by-Richard-Brant.pdf
    • http://muicuiu.dumb1.com/3a04a07a05a08a00/The-Gatekeeper-s-Promise-Gatekeeper-s-Saga-6-by-Eva-Pohler.pdf
    • http://muicuiu.dumb1.com/4a01a03a06a06a09/The-Gatekeeper-s-Secret-Gatekeeper-s-Saga-5-by-Eva-Pohler.pdf
    • http://muicuiu.dumb1.com/2a09a06a08a06a04/The-Gatekeeper-s-House-Gatekeeper-s-Saga-4-by-Eva-Pohler.pdf
    • http://muicuiu.dumb1.com/4a07a08a02a01a07/The-Descendant-and-the-Demon-s-Fork-Max-and-the-Gatekeeper-Book-III-by-James-Todd-Cochrane.pdf
    • http://muicuiu.dumb1.com/1a08a02a00a07a09/The-Gatekeeper-s-Saga-Gatekeeper-s-Saga-1-6-by-Eva-Pohler.pdf
    • http://muicuiu.dumb1.com/2a08a03a03a06a04/Richard-Doyle-s-Fairyland-Dover-Art-Coloring-Book-by-Richard-Doyle.pdf
    • http://muicuiu.dumb1.com/2a01a02a06a04a01/Unhidden-The-Gatekeeper-Chronicles-1-by-Dina-Given.pdf
    • http://muicuiu.dumb1.com/2a08a03a07a06a04/Marked-by-Sin-The-Gatekeeper-Chronicles-1-by-Jasmine-Walt.pdf
    • http://muicuiu.dumb1.com/2a08a03a07a06a09/Hunted-by-Sin-The-Gatekeeper-Chronicles-2-by-Jasmine-Walt.pdf
    • http://muicuiu.dumb1.com/7a05a08a02a07/Sons-of-Entropy-The-Gatekeeper-Trilogy-3-by-Christopher-Golden.pdf
    • http://muicuiu.dumb1.com/4a04a09a07a00a09/The-Gatekeeper-The-Chronicles-of-Prudence-the-Foundling-Fairy-1-by-Kim-Watts.pdf
    • http://muicuiu.dumb1.com/3a08a06a09a04a00/Echoes-by-Jason-Brant.pdf
    • http://muicuiu.dumb1.com/1a06a07a06a08a08/Demonmachy-by-Brant-Danay.pdf
    • http://muicuiu.dumb1.com/1a02a01a02a08/The-Business-of-Strangers-by-Kylie-Brant.pdf
    • http://muicuiu.dumb1.com/3a05a07a07a02a06/Devoured-The-Hunger-1-by-Jason-Brant.pdf
    • http://muicuiu.dumb1.com/1a00a08a00a07a05a05/Mike-Piazza-by-Brant-James.pdf
    • http://muicuiu.dumb1.com/3a05a09a07a08a05/Blitz-Inspector-Brant-4-by-Ken-Bruen.pdf

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