Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ead453ca6e5326d…

MALICIOUS

PDF

15.3 KB Created: 2019-04-30 05:26:44 +01:00 Authoring application: mPDF 5.7
MD5: a5978ec7511dca0358ae5c81cfbcb1f4 SHA-1: 459248d62ffd23fd2056a8a51b7588ea5dcdfe58 SHA-256: 5ead453ca6e5326d968275c5f5f8520f6b8aed3b4766db635e62b9b76b8d3710
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm, which is a common tactic for SEO poisoning or distributing malicious content. While the ML classifier flagged it as malicious, the specific intent beyond link distribution is unclear due to the lack of executable scripts or clear malicious document body text. The presence of numerous links suggests an attempt to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/1a06a08a05a08a03/Parson-Harding-s-Daughter-by-Caroline-Harvey.pdf
    • http://muicuiu.dumb1.com/2a04a02a02a09a09/Dolphin-Boy-Dolphin-Trilogy-1-by-Roy-Meyers.pdf
    • http://muicuiu.dumb1.com/5a04a01a02a06/The-Education-of-Caroline-The-Education-of-2-by-Jane-Harvey-Berrick.pdf
    • http://muicuiu.dumb1.com/4a06a03a07a03a05/Bonds-of-Brass-Bonds-of-Brass-1-by-Emily-Skrutskie.pdf
    • http://muicuiu.dumb1.com/2a08a05a06a03a09/Caroline-Takes-a-Chance-American-Girls-Caroline-4-by-Kathleen-Ernst.pdf
    • http://muicuiu.dumb1.com/2a05a02a08a00a06/Caroline-s-Secret-Message-American-Girls-Caroline-2-by-Kathleen-Ernst.pdf
    • http://muicuiu.dumb1.com/7a09a03a08a00a09/Harvey-Penick-s-Little-Red-Book-Lessons-and-Teachings-From-a-Lifetime-of-Golf-by-Harvey-Penick.pdf
    • http://muicuiu.dumb1.com/1a09a04a06a09/An-Archive-of-Hope-Harvey-Milk-s-Speeches-and-Writings-by-Harvey-Milk.pdf
    • http://muicuiu.dumb1.com/1a09a09a03a04/Sex-Charge-by-Perry-Brass.pdf
    • http://muicuiu.dumb1.com/1a06a06a04a08a06/Top-Brass-by-Elle-Marlow.pdf
    • http://muicuiu.dumb1.com/2a09a06a03a07a04/My-Name-Is-Caroline-by-Caroline-Adams-Miller.pdf
    • http://muicuiu.dumb1.com/2a08a00a03a03a06/The-Brass-Compass-by-Ellen-Butler.pdf
    • http://muicuiu.dumb1.com/4a01a09a00a05a08/Angel-of-Brass-by-Elaine-Corvidae.pdf
    • http://muicuiu.dumb1.com/3a08a00a08a08a01/Brass-Eagle-by-Margaret-Duffy.pdf
    • http://muicuiu.dumb1.com/4a05a04a02a06a05/Brass-Buttons-by-Sonya-C-Dodd.pdf
    • http://muicuiu.dumb1.com/2a05a04a06a07/Brass-Ring-by-Diane-Chamberlain.pdf
    • http://muicuiu.dumb1.com/6a06a06a02a03a06/The-Dolphin-Within-by-Olivia-De-Bergerac.pdf
    • http://muicuiu.dumb1.com/1a01a06a01a07a09/A-Dolphin-in-the-Bay-by-Diana-Noonan.pdf
    • http://muicuiu.dumb1.com/2a01a00a02a01a04/The-Brass-Bowl-by-Louis-Joseph-Vance.pdf
    • http://muicuiu.dumb1.com/4a01a08a03a04a08/Gears-of-Brass-Anthology-by-Jordan-Elizabeth.pdf

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