Malicious PDF — malware analysis report

Static analysis result for SHA-256 545d13fa1ef63e15…

MALICIOUS

PDF

14.9 KB Created: 2019-05-05 14:18:43 +01:00 Authoring application: mPDF 5.7
MD5: 487c0c2aa1da52b27b7a73672667cca8 SHA-1: 96c313d3ba319c93aa43535e613fd49ec19e1f3c SHA-256: 545d13fa1ef63e1501dacb25ad773baf3d291fdbf43590415a0b895b9db23a0e
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified as a link farm. The ML classifier also flagged this PDF as malicious. The primary attack pattern appears to be SEO poisoning or a similar technique to lure users to potentially malicious content hosted on the provided domains. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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.co
    • http://muicuiu.dumb1.com/1a08a00a06a06a06/Cherry-Ames-Visiting-Nurse-Cherry-Ames-8-by-Helen-Wells.pdf
    • http://muicuiu.dumb1.com/6a01a06a00a03a04/Cherry-Ames-Boarding-School-Nurse-Cherry-Ames-17-by-Helen-Wells.pdf
    • http://muicuiu.dumb1.com/1a08a00a05a06a06/Cherry-Ames-Chief-Nurse-Cherry-Ames-4-by-Helen-Wells.pdf
    • http://muicuiu.dumb1.com/1a08a00a06a06a09/Cherry-Ames-Flight-Nurse-Cherry-Ames-5-by-Helen-Wells.pdf
    • http://muicuiu.dumb1.com/2a03a04a06a06a07/Cherry-Ames-Cruise-Nurse-Cherry-Ames-9-by-Helen-Wells.pdf
    • http://muicuiu.dumb1.com/1a08a00a08a09a06/Cherry-Ames-Army-Nurse-Cherry-Ames-3-by-Helen-Wells.pdf
    • http://muicuiu.dumb1.com/3a08a05a05a06a04/Cherry-Ames-Jungle-Nurse-Cherry-Ames-25-by-Helen-Wells.pdf
    • http://muicuiu.dumb1.com/5a00a00a08a04a00/Cherry-Ames-Student-Nurse-by-Helen-Wells.pdf
    • http://muicuiu.dumb1.com/6a06a09a04a06a03/The-Ames-Family-of-Bruton-Somerset-England-by-Faber-K-Ames.pdf
    • http://muicuiu.dumb1.com/4a02a05a04a05a08/Cherry-A-Life-of-Apsley-Cherry-Garrard-by-Sara-Wheeler.pdf
    • http://muicuiu.dumb1.com/2a00a00a03a06a03/Cherry-Christmas-Vampire-Cherry-3-5-by-Sotia-Lazu.pdf
    • http://muicuiu.dumb1.com/4a07a02a04a00a03/Cherry-Blossom-Baseball-Cherry-Blossom-3-by-Jennifer-Maruno.pdf
    • http://muicuiu.dumb1.com/1a00a08a08a04a09a07/The-Cherry-Project-1-The-Cherry-Project-1-by-Naoko-Takeuchi.pdf
    • http://muicuiu.dumb1.com/5a03a03a03a04a03/Cherry-Blossom-Girls-2-Cherry-Blossom-Girls-2-by-Harmon-Cooper.pdf
    • http://muicuiu.dumb1.com/3a04a05a07a05a01/Cherry-Knots-Cherry-Knots-1-by-Noelle-N-.pdf
    • http://muicuiu.dumb1.com/3a05a04a08a07a03/All-That-Lies-Within-by-Lynn-Ames.pdf
    • http://muicuiu.dumb1.com/6a01a06a00a03a05/A-Hard-Man-to-Forget-by-Dan-Ames.pdf
    • http://muicuiu.dumb1.com/3a07a02a09a09a08/For-Old-Crime-s-Sake-by-Delano-Ames.pdf
    • http://muicuiu.dumb1.com/5a01a07a05a09a04/The-Value-of-Valor-Kate-amp-Jay-3-by-Lynn-Ames.pdf
    • http://muicuiu.dumb1.com/8a08a07a03a05a09/From-a-Single-Seed-by-Teri-Ames.pdf

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