Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ce6beb5edf88b3…

MALICIOUS

PDF

13.6 KB Created: 2019-04-30 05:48:31 +01:00 Authoring application: mPDF 5.7 First seen: 2021-10-12
MD5: 112bf1794b32aac0ffed4fb454b65252 SHA-1: 50e09e08bde258948a7dd2fa988de55f51993f82 SHA-256: b8ce6beb5edf88b3b4b4f574e64aaf93342458cd5845f5f46bd924a238fcc72a
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded URLs, identified as a link farm. The ML classifier also flagged it as malicious. While no scripts were explicitly extracted, the structure suggests an attempt to direct users to external content, potentially for SEO manipulation or to host malicious payloads. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/6a09a00a08a05a08/You-re-Not-Fooling-Anyone-When-You-Take-Your-Laptop-to-a-Coffee-Shop-Scalzi-on-Writing-by-John-Scalzi.pdf In PDF document text
    • http://muicuiu.dumb1.com/6a09a00a08a04a03/Subterranean-Scalzi-Super-Bundle-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a09a00a08a06a07/Uncle-John-s-Presents-The-Book-of-the-Dumb-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a04a08a04a04/Old-Man-s-War-Old-Man-s-War-1-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a07a06a05a00a03/Old-Man-s-War-Old-Man-s-War-1-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a09a00a08a07a00/When-the-Yogurt-Took-Over-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a07a09a02a03a07/Head-On-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a09a08a06a04a07/Lock-In-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a08a01a04/Head-On-Lock-In-2-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a01a04a05a07a03/The-Last-Emperox-The-Interdependency-3-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a02a04a07a09a08/Redshirts-A-Novel-with-Three-Codas-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a07a05a06a01/Fuzzy-Nation-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a07a08a08a04a05/The-Ghost-Brigades-Old-Man-s-War-2-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a09a00a08a00a00/The-Sagan-Diary-Old-Man-s-War-2-5-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a00a02a08a06/Redshirts-A-Novel-with-Three-Codas-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a00a05a00a04a03/The-Collapsing-Empire-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a09a04a04a06a06/The-Collapsing-Empire-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a07a08a02a02a06/Fuzzy-Nation-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a06a07a02a01/The-Ghost-Brigades-Old-Man-s-War-2-by-John-Scalzi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a03a09a06a07a05/Regarding-Your-Application-Status-by-John-Scalzi.pdfIn PDF document text

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