Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5cac7bfacf555f…

MALICIOUS

PDF

15.9 KB Created: 2019-04-30 04:33:33 +01:00 Authoring application: mPDF 5.7
MD5: e117472106c55518e0aa7d9460e6427e SHA-1: d4258b7b1b7fd74f577dab4a71942af6e7d18c15 SHA-256: da5cac7bfacf555f6e93287a7895cc14fbe6598cc2802d87d103267960833295
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file contains a large number of embedded URLs pointing to a single suspicious domain, muicuiu.dumb1.com. This behavior is indicative of a link farm or a phishing lure designed to direct users to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was heavily corrupted, preventing a more detailed analysis of the lure's content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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/1a00a08a06a03a03a00/Felix-Salten-quot-Bambi-Eine-Lebensgeschichte-aus-dem-Walde-quot-Ungek-rzte-deutschsprachige-Originalausgabe-by-Felix-Salten.pdf
    • http://muicuiu.dumb1.com/3a09a00a00a09/Bambi-by-Felix-Salten.pdf
    • http://muicuiu.dumb1.com/1a03a09a02a02a00/Bambi-s-Children-by-Felix-Salten.pdf
    • http://muicuiu.dumb1.com/7a04a08a04a06a09/The-Battles-of-Dune-by-Felix-Salten.pdf
    • http://muicuiu.dumb1.com/3a01a02a05a00a00/Bambi-A-Life-in-the-Woods-by-Felix-Salten.pdf
    • http://muicuiu.dumb1.com/6a01a04a06a03a09/Bambi-Au-Bambi-Au-by-Felix-Salten.pdf
    • http://muicuiu.dumb1.com/5a01a03a01a08a00/The-End-Fifteen-Endings-to-Fifteen-Paintings-by-Ashley-Stokes.pdf
    • http://muicuiu.dumb1.com/4a09a02a04a07a06/Forever-Fifteen-Forever-Fifteen-1-by-Kimberly-Steele.pdf
    • http://muicuiu.dumb1.com/7a04a02a05a00/The-Rabbits-by-John-Marsden.pdf
    • http://muicuiu.dumb1.com/5a02a03a00a01a08/Two-White-Rabbits-by-Jairo-Buitrago.pdf
    • http://muicuiu.dumb1.com/3a06a08a01a07a09/The-Night-of-Four-Hundred-Rabbits-by-Elizabeth-Peters.pdf
    • http://muicuiu.dumb1.com/8a01a03a03a09a01/How-to-Raise-Rabbits-for-Fun-amp-Profit-by-Milton-I-Faivre.pdf
    • http://muicuiu.dumb1.com/3a02a04a03a09a02/The-Royal-Rabbits-Of-London-by-Santa-Montefiore.pdf
    • http://muicuiu.dumb1.com/4a04a08a04a04a08/Chasing-Rabbits-The-Underground-1-by-Erin-R-Bedford.pdf
    • http://muicuiu.dumb1.com/3a06a04a07a07a06/Rabbits-Gentle-Hearts-Valiant-Spirits-Inspirational-Stories-of-Rescue-Triumph-and-Joy-by-Marie-Mead.pdf
    • http://muicuiu.dumb1.com/4a09a09a01a00a09/Fifteen-at-Last-by-Candice-Ransom.pdf
    • http://muicuiu.dumb1.com/2a05a00a00a00a06/Fifteen-Bones-by-R-J-Morgan.pdf
    • http://muicuiu.dumb1.com/1a03a01a03a03/Fifteen-First-Love-1-by-Beverly-Cleary.pdf
    • http://muicuiu.dumb1.com/4a06a06a02a01a09/Fifteen-The-Dreamwalker-Diaries-1-by-Jen-Estes.pdf
    • http://muicuiu.dumb1.com/1a08a00a08a03a01/Becoming-Project-Five-Fifteen-3-by-Samantha-Summers.pdf

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