Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a927d6fba257fbf…

MALICIOUS

PDF

19.8 KB Created: 2019-05-01 08:09:21 +01:00 Authoring application: mPDF 5.7
MD5: 9d2f290f07d940f34d764f7f3ac2321e SHA-1: 629388cfaf47ffee102ec5af384fd52d0672a074 SHA-256: 5a927d6fba257fbf1f63e3b34d75bf78a2d068f71caf581a732e35a20dab3525
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious with high confidence. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic firing suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cefasfese.4pu.com/4739730739733736/The-Christmas-Eve-Kiss-Christmas-in-Snow-Valley-4-by-Taylor-Hart.pdf
    • http://cefasfese.4pu.com/3734731737735739/An-Unexpected-Kiss-Christmas-in-Snow-Valley-1-by-Cindy-Roland-Anderson.pdf
    • http://cefasfese.4pu.com/4739739734738735/A-Daddy-for-Christmas-Christmas-in-Eden-Valley-1-by-Linda-Ford.pdf
    • http://cefasfese.4pu.com/4734730738735733/Her-Hollywood-Fake-Fiance-Christmas-Romance-Series-The-Legendary-Kent-Brother-Romances-by-Taylor-Hart.pdf
    • http://cefasfese.4pu.com/1730738733734732735/A-Sprinkling-of-Christmas-Magic-Christmas-Cinderella-Finding-Forever-at-Christmas-The-Captain-s-Christmas-Angel-by-Elizabeth-Rolls.pdf
    • http://cefasfese.4pu.com/1738739730733734/Coming-Home-for-Christmas-A-Christmas-in-Paradise-O-Christmas-Tree-No-Crib-for-a-Bed-by-Carla-Kelly.pdf
    • http://cefasfese.4pu.com/6731738730737/The-Christmas-Box-Collection-The-Christmas-Box-Timepiece-The-Letter-The-Christmas-Box-1-3-by-Richard-Paul-Evans.pdf
    • http://cefasfese.4pu.com/3737732739731737/A-Regency-Christmas-Scarlet-Ribbons-Christmas-Promise-A-Little-Christmas-by-Lyn-Stone.pdf
    • http://cefasfese.4pu.com/4734730733733732/The-Secret-of-a-Kiss-Return-to-Snow-Valley-by-Kimberley-Montpetit.pdf
    • http://cefasfese.4pu.com/2737733739730733/Operation-Kiss-the-Girl-Snow-Valley-Romance-by-Cindy-Roland-Anderson.pdf
    • http://cefasfese.4pu.com/3738731734732738/Summer-in-Snow-Valley-Snow-Valley-Romance-Anthologies-2-by-Cindy-Roland-Anderson.pdf
    • http://cefasfese.4pu.com/2731737731737737/All-I-Want-For-Christmas-by-Liliana-Hart.pdf
    • http://cefasfese.4pu.com/2730731730738/A-Valley-Ridge-Christmas-by-Holly-Jacobs.pdf
    • http://cefasfese.4pu.com/3735731738736738/Christmas-Moon-by-Sadie-Hart.pdf
    • http://cefasfese.4pu.com/3732737734735736/Santa-s-Helper-A-Christmas-Valley-Romance-1-by-Ann-Simas.pdf
    • http://cefasfese.4pu.com/3737734732738733/Christmas-Lovebirds-Have-A-Hart-1-by-Rachelle-Ayala.pdf
    • http://cefasfese.4pu.com/4735735730739736/Christmas-in-the-Snow-by-Karen-Swan.pdf
    • http://cefasfese.4pu.com/1730736737734738/Once-Upon-a-Christmas-Kiss-by-Manda-Collins.pdf
    • http://cefasfese.4pu.com/9735732733732733/Let-It-Snow-Minnesota-Christmas-1-by-Heidi-Cullinan.pdf
    • http://cefasfese.4pu.com/2735735737739732/Let-It-Snow-Minnesota-Christmas-1-by-Heidi-Cullinan.pdf

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