Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8dff2bb36c7a55…

MALICIOUS

PDF

15.3 KB Created: 2019-04-30 02:06:33 +01:00 Authoring application: mPDF 5.7
MD5: a7bd4d42df630166f6ccaa30cd01f36e SHA-1: 940bb95694a1d549bac4f53ccbf774af046c931f SHA-256: 7a8dff2bb36c7a5585d00f84c0806217724c95b8bb2e2cc16339cfd78dae065f
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. While the specific intent of the links is unclear due to the benign reputation of the initial set, the sheer volume and the critical heuristic firing suggest a malicious purpose.

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/4a08a00a07a02a00/A-Christmas-Heat-Wave-Heat-Wave-3-5-by-Alannah-Lynne.pdf
    • http://muicuiu.dumb1.com/2a02a05a02a07a03/Saving-Me-Heat-Wave-1-by-Alannah-Lynne.pdf
    • http://muicuiu.dumb1.com/2a06a04a09a00a01/Heat-Wave-Nikki-Heat-1-by-Richard-Castle.pdf
    • http://muicuiu.dumb1.com/4a03a06a04a03a00/Heat-Wave-by-Barbara-Delinsky.pdf
    • http://muicuiu.dumb1.com/4a01a06a05a01a06/Heat-Wave-Seasons-of-Love-3-by-Elyse-Springer.pdf
    • http://muicuiu.dumb1.com/5a01a08a08a05/Heat-Wave-A-Social-Autopsy-of-Disaster-in-Chicago-by-Eric-Klinenberg.pdf
    • http://muicuiu.dumb1.com/1a06a07a00a03a01/Heat-Wave-Aloha-Escapade-Pippa-Romance-Novelette-Boxed-Set-1-2-and-3-by-Pippa-McLaren.pdf
    • http://muicuiu.dumb1.com/4a02a05a06a07a08/The-God-Wave-The-God-Wave-Trilogy-1-by-Patrick-Hemstreet.pdf
    • http://muicuiu.dumb1.com/5a05a02a02a03/The-5th-Wave-The-5th-Wave-1-by-Rick-Yancey.pdf
    • http://muicuiu.dumb1.com/3a03a00a04a03a09/Harvest-Heat-Australian-1-by-Carol-Lynne.pdf
    • http://muicuiu.dumb1.com/3a07a00a05a00a00/Ian-s-Choice-Wolves-Heat-1-by-Odessa-Lynne.pdf
    • http://muicuiu.dumb1.com/4a01a05a08a04a09/Alpha-Heat-Heat-of-Love-2-by-Leta-Blake.pdf
    • http://muicuiu.dumb1.com/2a08a02a08a05a05/Heat-Of-The-Moment-Brooklyn-Heat-2-by-Locklyn-Marx.pdf
    • http://muicuiu.dumb1.com/4a03a05a09a09a09/Slow-Heat-Pacific-Heat-2-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/1a07a08a00/Driving-Heat-Nikki-Heat-7-by-Richard-Castle.pdf
    • http://muicuiu.dumb1.com/2a04a08a07a09a00/Raging-Heat-Nikki-Heat-6-by-Richard-Castle.pdf
    • http://muicuiu.dumb1.com/2a09a09a04a05a07/Slow-Heat-Heat-of-Love-1-by-Leta-Blake.pdf
    • http://muicuiu.dumb1.com/1a02a03a05a00a04/Desert-Heat-Heat-Series-by-Leigh-Wyndfield.pdf
    • http://muicuiu.dumb1.com/3a08a08a01a00a07/Icy-Heat-Heat-Series-by-Leigh-Wyndfield.pdf
    • http://muicuiu.dumb1.com/4a08a02a06a07a08/Can-t-Take-The-Heat-Brooklyn-Heat-1-by-Locklyn-Marx.pdf
    • http://muicuiu.dumb1.com/3a03a00a04a03a09/Harvest-Heat-Australian-1-by-Carol-Lynne

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