Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df37e1dd1e0b1e3…

MALICIOUS

PDF

18.3 KB Created: 2019-04-28 12:45:46 +01:00 Authoring application: mPDF 5.7
MD5: 4c143b2e29f6c0c9f68090081a22108d SHA-1: bdb7dbc03829028f50a0ce22268c4de5f744ae33 SHA-256: 4df37e1dd1e0b1e3edfd5e0af3847c5e50d545a5492127325082b855374ff122
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted from this sample, limiting the ability to determine a specific payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/2a09a09a07a09a07/Obey-His-Command-1-by-Piper-Scott.pdf
    • http://muicuiu.dumb1.com/2a09a09a09a02a05/Stay-His-Command-3-by-Piper-Scott.pdf
    • http://muicuiu.dumb1.com/2a09a09a07a06a00/Breathe-His-Command-5-by-Piper-Scott.pdf
    • http://muicuiu.dumb1.com/2a07a03a02a04a02/Footprints-in-the-Sand-A-Piper-Donovan-Mystery-Piper-Donovan-Wedding-Cake-Mysteries-Book-3-by-Mary-Jane-Clark.pdf
    • http://muicuiu.dumb1.com/2a00a08a02a07a08/Piper-LeVine-A-Gypsy-s-Truth-Piper-LeVine-1-by-Eris-Kelli.pdf
    • http://muicuiu.dumb1.com/6a04a00a06a04a01/Sanctification-in-the-Everyday-Three-Sermons-by-John-Piper-by-John-Piper.pdf
    • http://muicuiu.dumb1.com/7a05a04a00a08a06/Daily-Paintings-The-Art-of-Piper-Thibodeau-by-Piper-Thibodeau.pdf
    • http://muicuiu.dumb1.com/4a03a03a08a00a04/30-Seconds-by-Chrys-Fey.pdf
    • http://muicuiu.dumb1.com/1a01a08a09a09a00a08/Flappers-and-Philosophers-1920-by-Francis-Scott-Fitzgerald-Francis-Scott-Key-Fitzgerald-September-24-1896---December-21-1940-Known-Professionally-as-F-Scott-Fitzgerald-Was-an-American-Novelist-and-Short-Story-Writer-Whose-Works-Illustrate-by-F-Scott-Fitzgerald.pdf
    • http://muicuiu.dumb1.com/5a05a08a05a02a03/180-Seconds-by-Jessica-Park.pdf
    • http://muicuiu.dumb1.com/3a04a03a06a05a07/Anyone-for-Seconds-by-Fiona-Cassidy.pdf
    • http://muicuiu.dumb1.com/1a01a00a01a05a05/180-Seconds-by-Jessica-Park.pdf
    • http://muicuiu.dumb1.com/5a09a08a08a01/Second-Chances-When-Seconds-Count-1-by-D-L-Roan.pdf
    • http://muicuiu.dumb1.com/2a01a08a04a01a09/Six-Seconds-of-Moonlight-by-James-Coughtrey.pdf
    • http://muicuiu.dumb1.com/3a06a01a01a09a04/The-Last-Six-Million-Seconds-by-John-Burdett.pdf
    • http://muicuiu.dumb1.com/4a09a06a08a05a03/Sinful-Seconds-by-Elisabeth-Naughton.pdf
    • http://muicuiu.dumb1.com/9a08a06a01a08a05/Final-Seconds-by-John-Lutz.pdf
    • http://muicuiu.dumb1.com/4a06a03a02a09a09/The-Last-Six-Million-Seconds-by-John-Burdett.pdf
    • http://muicuiu.dumb1.com/7a07a00a03a06a04/Film-in-Five-Seconds-by-Matteo-Civaschi.pdf
    • http://muicuiu.dumb1.com/3a07a05a02a09a04/2-Seconds-Late-By-the-Numbers-by-Eric-Wilson.pdf
    • http://muicuiu.dumb1.com/1a01a08a09a09a00a08/Flappers-and-Philosophers-1920-by-Francis-Scott-Fitzgerald-Francis-Scott-Key-Fitzge

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