Malicious PDF — malware analysis report

Static analysis result for SHA-256 05549fcd53c6885b…

MALICIOUS

PDF

13.4 KB Created: 2019-04-30 03:53:00 +01:00 Authoring application: mPDF 5.7
MD5: a9eb036b4b8d6193d6a27d6ec516622a SHA-1: 7c95951d6868d0e4d92e44dcdaa7fcf0516f650b SHA-256: 05549fcd53c6885b4797b6d767230258879e55c73270ee27166bb68cb9aba0f5
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 by the 'PDF_SEO_LINK_FARM' heuristic. While the ML classifier also flagged it as malicious, the primary observed behavior is the creation of a link farm. The document body is heavily obfuscated but contains URLs that are also listed in the heuristics, suggesting a coordinated effort to direct users to these external resources.

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/2a03a07a04a01a02/Testimony-of-Two-Men-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/6a03a09a02a00a05/Melissa-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/1a04a00a00a07a03/Dialogues-with-the-Devil-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/2a06a04a06a09a00/A-Prologue-to-Love-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/2a05a07a06a09a06/Wicked-Angel-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/3a02a09a09a01a03/Your-Sins-and-Mine-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/2a09a07a04a00a05/Grandmother-and-the-Priests-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/4a06a00a09a05a06/Captains-and-the-Kings-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/1a03a09a01a09a05/Captains-and-the-Kings-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/9a03a03a04a05/Great-Lion-of-God-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/3a08a01a08a00a08/Bright-Flows-the-River-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/1a01a03a09a00a06a05/In-Search-of-Taylor-Caldwell-by-Jess-Stearn.pdf
    • http://muicuiu.dumb1.com/1a05a04a07a08a03/On-Growing-Up-Tough-An-Irreverent-Memoir-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/7a03a02a04a08a02/Dynasty-of-Death-Barbours-Bouchards-1-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/1a01a03a09a01a06a08/The-Search-for-a-Soul-Taylor-Caldwell-s-Psychic-Lives-by-Jess-Stearn.pdf
    • http://muicuiu.dumb1.com/9a01a03a07a07a08/Jackpot-The-Short-Stories-of-Erskine-Caldwell-by-Erskine-Caldwell.pdf
    • http://muicuiu.dumb1.com/3a06a04a07a07a01/The-Dog-Listener-by-Jan-Fennell.pdf
    • http://muicuiu.dumb1.com/1a06a07a08a01a08/The-Night-Listener-by-Armistead-Maupin.pdf
    • http://muicuiu.dumb1.com/4a05a05a01a02a07/The-Night-Listener-by-Armistead-Maupin.pdf
    • http://muicuiu.dumb1.com/4a04a00a00a04a05/The-Night-Listener-by-Armistead-Maupin.pdf

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