Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a8d47ed847d5be…

MALICIOUS

PDF

12.9 KB Created: 2019-04-30 05:01:52 +01:00 Authoring application: mPDF 5.7
MD5: 08919dd3a8699bc9dda09a481b01b9ef SHA-1: 5d445c0dfea744bd3d8c3cf3746a177a67364ed1 SHA-256: 73a8d47ed847d5be61a043b94187141fc0032393a582c8075773f6596b68326f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified as a link farm. While the document body is corrupted, the PDF structure and the heuristic firings strongly suggest an attempt to manipulate search engine results or direct users to a large collection of potentially malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8891

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/1a00a02a03a09a07/Ride-the-Dark-Trail-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/7a06a01a02a01/Ride-the-River-Louis-Lamour-Collection-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/4a01a09a07a09a00/Crossfire-Trail-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/7a01a09a00a05a00/Dark-Canyon-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/2a08a07a03a00a02/The-Collected-Short-Stories-of-Louis-L-Amour-The-Adventure-Stories-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/1a00a03a04a00a08/Conagher-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/5a04a00a07a00a03/Frontier-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/1a00a03a09a08a06/Sitka-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/1a00a03a08a05a09/Shalako-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/9a00a03a00a08/Mustang-Man-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/5a06a06a03a01/How-the-West-Was-Won-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/3a08a01a02a07a09/The-Man-Called-Noon-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/4a01a09a09a02a03/The-Lawless-West-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/2a09a03a02a05a05/Reilly-s-Luck-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/4a08a00a02a06a03/The-Lonesome-Gods-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/4a07a05a01a06a08/Yondering-Stories-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/2a09a05a09a02a05/Silver-Canyon-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/2a03a02a01a08a08/The-Ferguson-Rifle-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/2a03a02a06a09a00/Rivers-West-by-Louis-L-39-Amour.pdf
    • http://muicuiu.dumb1.com/8a00a03a09a04/Comstock-Lode-by-Louis-L-39-Amour.pdf

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