Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6273827ffe2cb56…

MALICIOUS

PDF

12.6 KB Created: 2019-05-06 16:52:29 +01:00 Authoring application: mPDF 5.7
MD5: be8225052e30b59ece3b08ec1bf90864 SHA-1: 55a3993f8d2d1ef6925693fc55e77f304e489c9d SHA-256: a6273827ffe2cb56b3073f56895b8f3a0a51080df930e924abe51dce7278c77e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified as a link farm. The ML classifier also flagged this PDF as malicious. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic firing suggest a malicious intent, likely for SEO spam or to redirect to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

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/1a00a00a00/Finding-Audrey-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/6a00a01a02a08a09/Audrey-retrouv-e-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/8a05a06a05a05a03/I-Owe-You-One-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/8a05a06a05a05a05/Fairy-Mom-and-Me-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/1a02a06a02a03a08/I-ve-Got-Your-Number-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/2a05a05a07a05a01/I-ve-Got-Your-Number-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/1a05a04a01a08a08/Can-You-Keep-a-Secret-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/5a04a04a07a08a07/A-Fada-do-Lar-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/3a00a04a02a03a09/Surprise-Me-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/7a03a07a08/Surprise-Me-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/1a02a05a07a03a07/I-ve-Got-Your-Number-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/6a06a09a01a00a05/Can-You-Keep-a-Secret-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/3a03a07a08a05/Remember-Me-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/3a01a00a07a06/Wedding-Night-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/4a05a04a07a05a03/Twenties-Girl-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/4a06a08a05a09a09/Twenties-Girl-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/1a09a04a07a02a04/Wedding-Night-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/2a09a02a01a06a05/Twenties-Girl-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/3a05a02a00a05/The-Undomestic-Goddess-by-Sophie-Kinsella.pdf
    • http://muicuiu.dumb1.com/8a05a06a05a05a02/Biography-of-Sophie-Kinsella-by-Linda-F-.pdf
    • http://muicuiu.dumb1.com

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