Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d5f5ef0ec3ae48…

MALICIOUS

PDF

13.5 KB Created: 2019-04-30 03:25:28 +01:00 Authoring application: mPDF 5.7
MD5: f3ef6ea81d99e118d0cec3d22ead2c94 SHA-1: 9dd1bed0bbffe7b0d5c6b907aa284ea75506ebb1 SHA-256: 56d5f5ef0ec3ae4849948508d21bbe7fc8583489cf5d01bcf7aef1faf617d7d7
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. While the URLs themselves are currently flagged as benign, the sheer volume and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest a malicious intent, likely for SEO manipulation or to redirect users to malicious content. The ML classifier also flagged the PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/1a00a06a00a04a08a05/A-Necessary-End-David-Webb-2-by-Anthea-Fraser.pdf
    • http://muicuiu.dumb1.com/1a00a06a00a05a06a03/Pretty-Maids-All-in-a-Row-David-Webb-3-by-Anthea-Fraser.pdf
    • http://muicuiu.dumb1.com/4a07a00a08a03a01/A-Shroud-for-Delilah-David-Webb-1-by-Anthea-Fraser.pdf
    • http://muicuiu.dumb1.com/1a01a00a00a00a01a03/Making-Potpourri-Soaps-and-Colognes-102-Natural-Recipes-by-David-A-Webb.pdf
    • http://muicuiu.dumb1.com/3a01a07a02a04a02/The-Cuckoo-s-Parting-Cry-by-Anthea-Halliwell.pdf
    • http://muicuiu.dumb1.com/7a08a05a09a05a03/The-Courting-of-Philippa-by-Anthea-Malcolm.pdf
    • http://muicuiu.dumb1.com/1a08a07a02a06a08/The-Dark-Lake-by-Anthea-Carson.pdf
    • http://muicuiu.dumb1.com/1a09a06a03a06a04/The-First-Adventure-Feyland-0-5-by-Anthea-Sharp.pdf
    • http://muicuiu.dumb1.com/2a08a00a09a07a01/The-Dark-Lake-by-Anthea-Carson.pdf
    • http://muicuiu.dumb1.com/5a03a01a08a06a05/Eventually-Julie-Julie-amp-Friends-1-by-Anthea-Syrokou.pdf
    • http://muicuiu.dumb1.com/4a09a08a00a01a07/Time-To-Let-Go-by-Alison-Fraser.pdf
    • http://muicuiu.dumb1.com/1a01a02a05a03a03a05/Finding-Fraser-by-K-C-Dyer.pdf
    • http://muicuiu.dumb1.com/9a07a00/Finding-Fraser-by-K-C-Dyer.pdf
    • http://muicuiu.dumb1.com/3a09a06a05a03a04/An-Infamous-Marriage-by-Susanna-Fraser.pdf
    • http://muicuiu.dumb1.com/4a02a01a03a00a03/My-Father-s-House-by-Sylvia-Fraser.pdf
    • http://muicuiu.dumb1.com/3a06a08a02a08a00/Longing-for-Kayla-by-Lauren-Fraser.pdf
    • http://muicuiu.dumb1.com/6a02a09a08a02a01/Charlotte-Bront-by-Rebecca-Fraser.pdf
    • http://muicuiu.dumb1.com/2a00a03a01a03a02/The-Strength-Of-Desire-by-Alison-Fraser.pdf
    • http://muicuiu.dumb1.com/2a00a04a00a00/A-Very-Scandalous-Holiday-by-Nancy-Fraser.pdf
    • http://muicuiu.dumb1.com/1a01a01a06a00a03/Conversations-with-J-K-Rowling-by-Lindsey-Fraser.pdf
    • http://muicuiu.dumb1.com/9a07a00/Finding-Fraser

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