Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af47dcfe13a5970…

MALICIOUS

PDF

16.1 KB Created: 2019-04-30 05:49:14 +01:00 Authoring application: mPDF 5.7
MD5: 1d6eaf29b0d1c2c291e6e60b685d6662 SHA-1: a0aa567ebbb1364bd96430df83fabe9149e17fdc SHA-256: 5af47dcfe13a597008a3c3d6d213a2633e22453d43b020c4810a4e43b5ab5872
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 external resources, potentially for SEO manipulation or to serve malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

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/3a05a03a03a07a03/Parchment-and-Old-Lace-Scrapbooking-Mystery-13-by-Laura-Childs.pdf
    • http://muicuiu.dumb1.com/4a08a09a02a03a01/Motif-for-Murder-A-Scrapbooking-Mystery-4-by-Laura-Childs.pdf
    • http://muicuiu.dumb1.com/2a02a08a05a05a05/Oolong-Dead-A-Tea-Shop-Mystery-10-by-Laura-Childs.pdf
    • http://muicuiu.dumb1.com/2a08a01a02a03a09/Steeped-in-Evil-A-Tea-Shop-Mystery-15-by-Laura-Childs.pdf
    • http://muicuiu.dumb1.com/2a06a01a05a02a09/Death-by-Darjeeling-A-Tea-Shop-Mystery-1-by-Laura-Childs.pdf
    • http://muicuiu.dumb1.com/1a06a08a09a05a02/Chamomile-Mourning-A-Tea-Shop-Mystery-6-by-Laura-Childs.pdf
    • http://muicuiu.dumb1.com/1a06a05a07a01a07/Blood-Orange-Brewing-A-Tea-Shop-Mystery-7-by-Laura-Childs.pdf
    • http://muicuiu.dumb1.com/1a06a05a05a04a07/Shades-of-Earl-Grey-A-Tea-Shop-Mystery-3-by-Laura-Childs.pdf
    • http://muicuiu.dumb1.com/5a00a02a06a02/The-Parchment-Tale-Unfolds-The-Parchment-Series-2-by-SKETA.pdf
    • http://muicuiu.dumb1.com/5a04a00a08a06/The-Parchment-The-Parchment-Series-1-by-SKETA.pdf
    • http://muicuiu.dumb1.com/1a07a08a02a07a03/Larceny-And-Lace-A-Vintage-Magic-Mystery-2-by-Annette-Blair.pdf
    • http://muicuiu.dumb1.com/4a01a01a06a09a07/Spurs-and-Lace-Lonely-Lace-Series-1-by-Bonnie-R-Paulson.pdf
    • http://muicuiu.dumb1.com/1a07a01a05a05a01/Steel-and-Lace-Lace-1-by-Adriane-Leigh.pdf
    • http://muicuiu.dumb1.com/1a07a01a04a07a04/Whiskey-and-Lace-Lace-2-by-Adriane-Leigh.pdf
    • http://muicuiu.dumb1.com/2a02a09a04a02a07/London-Lace-Complete-Series-London-Lace-1-5-by-Catou-Martine.pdf
    • http://muicuiu.dumb1.com/3a05a06a07a02a08/A-Page-Out-of-Life-A-Scrapbooking-Novel-by-Kathleen-Reid.pdf
    • http://muicuiu.dumb1.com/6a07a03a09a09/Die-Buying-A-Mall-Cop-Mystery-1-by-Laura-DiSilverio.pdf
    • http://muicuiu.dumb1.com/9a05a07a03a00a06/Spooky-Vintage-Pictures-to-Use-in-Your-Scrapbooking-and-Decoupage-Projects-by-Virinia-Downham.pdf
    • http://muicuiu.dumb1.com/7a01a04a09a04a02/Hayburner-A-Gail-McCarthy-Mystery-by-Laura-Crum.pdf
    • http://muicuiu.dumb1.com/2a06a07a04a03a09/The-Big-Brush-off-A-Jake-amp-Laura-Mystery-4-by-Michael-Murphy.pdf

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