Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fef9c1d9b7808a1…

MALICIOUS

PDF

13.5 KB Created: 2019-04-30 06:41:20 +01:00 Authoring application: mPDF 5.7
MD5: a75c4068e45e734e1871e79939f72901 SHA-1: 158f45801d243c7d0679dbd1773beb6bf029fb99 SHA-256: 7fef9c1d9b7808a18a1afd2d5f1368eb49a1919ef235ed4104c822dea93678ef
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. The embedded URLs, while currently marked as benign, are part of a link farm strategy, suggesting the document's purpose is to redirect users to potentially malicious content. 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/6a00a03a07a06a04/La-qu-te-des-ours-tome-4-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/6a00a01a04a03a07/La-qu-te-des-ours-tome-1-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/8a04a08a01a09a01/La-guerre-des-Clans-version-illustr-e-cycle-III---tome-2-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/8a04a08a01a03a05/La-guerre-des-Clans-version-illustr-e-cycle-III---tome-1-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/2a02a02a06a06a08/A-Dangerous-Path-Warriors-Series-5-by-Erin-Hunter-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/3a01a02a06a03/The-Sun-Trail-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/2a09a02a06a05a09/Into-the-Wild-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/3a02a07a08a01/Into-the-Wild-Warriors-1-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/1a03a05a07a05a05/Fire-in-the-Sky-Seekers-5-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/4a01a05a06a02/Code-of-the-Clans-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/4a06a01a00a02a03/Into-the-Wild-Warriors-1-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/1a03a05a07a03a04/The-Last-Wilderness-Seekers-4-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/2a09a03a03a02a01/A-Hidden-Enemy-Survivors-2-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/3a03a04a00a09a07/Warriors-Power-of-Three-Box-Set-Books-1-3-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/7a08a00a02a05/The-Quest-Begins-Seekers-1-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/1a03a06a02a06a01/The-Endless-Lake-Survivors-5-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/3a00a03a03a08a05/Sunset-Warriors-The-New-Prophecy-6-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/1a03a05a08a01a09/Spirits-in-the-Stars-Seekers-6-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/3a04a00a05a02/Forest-of-Secrets-Warriors-3-by-Erin-Hunter.pdf
    • http://muicuiu.dumb1.com/3a04a07a01a08/Midnight-Warriors-The-New-Prophecy-1-by-Erin-Hunter.pdf

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