Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a21dfb116792655…

MALICIOUS

PDF

13.7 KB Created: 2019-05-02 00:44:53 +01:00 Authoring application: mPDF 5.7
MD5: dadd7d3d899c6dd42959e2a9ffb95b35 SHA-1: 405c72982f5e8306b848928ca3b8ca88a293ec4c SHA-256: 6a21dfb116792655ce2dab690108c47f38f467db94b8ada2ad7f5d3e52c0c29e
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm. While the document body is heavily obfuscated, the presence of numerous URLs suggests an attempt to direct users to potentially malicious content or to manipulate search engine results. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the link farm behavior is indicative of a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/3a01a02a06a05a02/Abe-s-Lucky-Day-by-Jill-Warren.pdf
    • http://muicuiu.dumb1.com/4a08a05a05a08a08/Lucky-in-Love-Lucky-Harbor-4-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/3a04a04a07a04a06/It-Had-to-be-You-Lucky-Harbor-7-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/1a04a04a05a07a02/At-Last-Lucky-Harbor-5-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/3a00a03a07a08a01/Forever-and-a-Day-Lucky-Harbor-6-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/2a00a01a00a04a01/Once-in-a-Lifetime-Lucky-Harbor-9-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/9a06a04a02a09a06/Unlucky-in-Love-Lucky-1-by-Jill-Sanders.pdf
    • http://muicuiu.dumb1.com/2a08a02a02a09a02/Once-in-a-Lifetime-Lucky-Harbor-9-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/4a05a00a02a00a04/One-in-a-Million-Lucky-Harbor-12-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/8a09a03a08a02a06/Wind-in-de-zeilen-Lucky-Harbor-2-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/4a03a05a03a02a07/Merry-Christmas-Baby-Lucky-Harbor-12-5-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/2a05a08a09a00a02/Lucky-Bastard-Lucky-O-Toole-4-by-Deborah-Coonts.pdf
    • http://muicuiu.dumb1.com/2a08a05a08a04a02/Not-So-Lucky-Lucky-Clover-1-by-RaShelle-Workman.pdf
    • http://muicuiu.dumb1.com/1a07a07a06a08a03/Lucky-Streak-Lucky-2-by-Carly-Phillips.pdf
    • http://muicuiu.dumb1.com/5a09a05a07a01/Lucky-Starr-and-the-Oceans-of-Venus-Lucky-Starr-3-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/2a04a04a01a07a09/Jill-s-Pony-Trek-Jill-s-Ponies-9-by-Ruby-Ferguson.pdf
    • http://muicuiu.dumb1.com/7a07a09a00a03a08/Ghost-Hunters-Ed-amp-Lorraine-Warren-2-by-Ed-Warren.pdf
    • http://muicuiu.dumb1.com/9a04a08a09a08a01/Satan-s-Harvest-Ed-amp-Lorraine-Warren-6-by-Ed-Warren.pdf
    • http://muicuiu.dumb1.com/2a00a08a05a05a07/Jill-s-Gymkhana-Jill-s-Ponies-1-by-Ruby-Ferguson.pdf
    • http://muicuiu.dumb1.com/3a07a07a09a01a03/The-Haunted-Ed-amp-Lorraine-Warren-3-by-Ed-Warren.pdf

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