Malicious PDF — malware analysis report

Static analysis result for SHA-256 626ad8cbd512323c…

MALICIOUS

PDF

14.7 KB Created: 2019-04-30 04:45:20 +01:00 Authoring application: mPDF 5.7
MD5: b4c12166fbc9020108eb213a1d3072f1 SHA-1: c94227c2067c801fb2013a1f3a0d170dcf120446 SHA-256: 626ad8cbd512323c343c3e4e0af121473ffbd2148ac4c2ca0df6a4228a120702
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs that appear to be part of a link farm, likely intended to trick users into downloading malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/6a04a04a05a08/Exotica-The-Nightshade-Cases-2-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a02a06a05a01a09/Run-The-Hunted-1-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a03a00a00a04/Blood-Magic-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/2a04a03a06a09a06/The-Wild-Hayle-Coven-4-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a02a09a05a07/Girl-Incredible-Kit-MacLean-1-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a03a00a02a06/The-Undying-Hayle-Coven-16-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a02a07a03a04/The-Brotherhood-Hayle-Coven-Destinies-3-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a03a00a00a07/The-Order-Hayle-Coven-Destinies-6-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a02a09a09a04/Gateway-Hayle-Coven-Destinies-5-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a03a00a02a08/Unseelie-Ties-Hayle-Coven-14-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a03a00a00a05/Dark-Brother-Hayle-Coven-Destinies-7-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a03a00a02a04/Coven-Leader-Hayle-Coven-19-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/1a06a03a00a01a05/Clone-Three-The-Clone-Chronicles-1-by-Patti-Larsen.pdf
    • http://muicuiu.dumb1.com/4a08a00a01a06/Rift-Nightshade-Prequel-1-Nightshade-World-1-by-Andrea-Cremer.pdf
    • http://muicuiu.dumb1.com/3a03a08a05a05/Wolfsbane-Nightshade-2-Nightshade-World-5-by-Andrea-Cremer.pdf
    • http://muicuiu.dumb1.com/3a03a08a06a03/Bloodrose-Nightshade-3-Nightshade-World-6-by-Andrea-Cremer.pdf
    • http://muicuiu.dumb1.com/2a09a03a08a04a07/Nightshade-Nightshade-1-by-Andrea-Cremer.pdf
    • http://muicuiu.dumb1.com/4a03a00a02a05a04/Nightshade-Nightshade-1-by-Andrea-Cremer.pdf
    • http://muicuiu.dumb1.com/3a04a09a06a01a02/The-Complete-Fiction-of-Nella-Larsen-Passing-Quicksand-and-the-Stories-by-Nella-Larsen.pdf
    • http://muicuiu.dumb1.com/7a07a07a04a06a06/Patti-Labelle-s-Lite-Cuisine-by-Patti-LaBelle.pdf

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