Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1c5803382f0c68…

MALICIOUS

PDF

11.9 KB Created: 2019-04-30 02:54:25 +01:00 Authoring application: mPDF 5.7
MD5: 1d64807d79efa88c707860e83c9734b1 SHA-1: d78cc1a25256a6a1caaddf1234faa4ef6c84dc3c SHA-256: 6b1c5803382f0c6830e63a4e03f06030d442c9b50ead7eab8a16e926d9adec61
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, masquerading as a download lure. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves directing users to download potentially malicious content via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8737

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/3a04a04a01a04a05/Frederica-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/2a09a06a01a00a05/Sylvester-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/7a01a00a05a00/Frederica-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/5a00a01a06a07a09/Venetia-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/1a04a09a03a00a01/The-Foundling-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/7a05a01a03a08/The-Foundling-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/2a06a04a08a05a03/The-Conqueror-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/1a04a08a07a05a08/Beauvallet-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/4a00a01a07a01/Venetia-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/3a08a02a09a07/Arabella-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/6a08a00a02a09a06/Arabella-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/4a05a02a09a08a01/The-Conqueror-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/4a02a08a08a08a09/Pistols-for-Two-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/1a09a01a06a00a03/Frederica-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/7a01a06a08a09/The-Grand-Sophy-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/1a03a07a00a08a00/Faro-s-Daughter-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/2a04a04a05a03a07/Powder-and-Patch-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/1a05a00a00a02a05/The-Reluctant-Widow-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/2a06a04a03a00a00/The-Unknown-Ajax-by-Georgette-Heyer.pdf
    • http://muicuiu.dumb1.com/5a00a01a05a03a06/Powder-And-Patch-by-Georgette-Heyer.pdf

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