Malicious PDF — malware analysis report

Static analysis result for SHA-256 d851730720b3125f…

MALICIOUS

PDF

20.8 KB Created: 2019-04-30 06:15:01 +01:00 Authoring application: mPDF 5.7
MD5: e842414457359779330653fb72af5568 SHA-1: f0d397cd302b58c0cb8fb8e5e7ae13d32f28b1c5 SHA-256: d851730720b3125f0033adbd3a0edd9e40fb988854fefc4ca38c1c0733c51df6
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDFs, many of which are hosted on the suspicious domain 'muicuiu.dumb1.com'. This technique is often used to distribute malicious content or to engage in SEO poisoning to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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/6a06a05a09a02a06/On-the-Shoulders-of-Hobbits-The-Road-to-Virtue-with-Tolkien-and-Lewis-by-Louis-Markos.pdf
    • http://muicuiu.dumb1.com/1a01a03a01a06a02/The-Inklings-C-S-Lewis-J-R-R-Tolkien-Charles-Williams-and-Their-Friends-by-Humphrey-Carpenter.pdf
    • http://muicuiu.dumb1.com/3a01a05a01a09a01/The-Fellowship-The-Literary-Lives-of-the-Inklings-J-R-R-Tolkien-C-S-Lewis-Owen-Barfield-Charles-Williams-by-Philip-Zaleski.pdf
    • http://muicuiu.dumb1.com/1a05a09a09a00/At-The-End-Of-The-Open-Road-by-Louis-Simpson.pdf
    • http://muicuiu.dumb1.com/4a03a02a07a05/Chapel-Road-by-Louis-Paul-Boon.pdf
    • http://muicuiu.dumb1.com/6a06a04a06a08a02/Les-Rois-de-France-Louis-XIII-Louis-XIV-Louis-XV-Louis-XVI-by-Jean-Christian-Petitfils.pdf
    • http://muicuiu.dumb1.com/2a05a07a02a06a09/The-Splendid-Century-Life-in-the-France-of-Louis-XIV-by-W-H-Lewis.pdf
    • http://muicuiu.dumb1.com/3a03a08a05a04a04/Easy-Virtue-Virtue-1-by-Mia-Asher.pdf
    • http://muicuiu.dumb1.com/5a03a02a05a07a07/A-Murder-On-Grand-Point-Road-The-Killing-of-Louis-Courville-by-Ted-Bourque.pdf
    • http://muicuiu.dumb1.com/1a00a09a06a01a00/Elements-The-Crystal-Series-1-by-Nia-Markos.pdf
    • http://muicuiu.dumb1.com/1a01a08a01a02a03a01/Masters-of-Fantasy-J-R-R-Tolkien-Tony-DiTerlizzi-and-Holly-Black-Michael-Ende-Robert-Erwin-Howard-Clive-Staples-Lewis-Christopher-Paolini-J-K-Rowling-by-Stefano-Donno.pdf
    • http://muicuiu.dumb1.com/8a08a00a07a00a02/Tolkiens-gr-te-Helden---Wie-die-Hobbits-die-Welt-eroberten-Anthologie-by-Bernhard-Hennen.pdf
    • http://muicuiu.dumb1.com/6a06a08a08a03a00/J-R-R-Tolkien-Audio-CD-Collection-by-J-R-R-Tolkien.pdf
    • http://muicuiu.dumb1.com/3a07a08a05a09a03/Shoulders-by-Georgia-Cotrell.pdf
    • http://muicuiu.dumb1.com/9a06a03a08a09/The-Shoulders-On-Which-I-Stand-by-Karimah-Grayson.pdf
    • http://muicuiu.dumb1.com/1a00a05a07a08a07a06/The-Frost-on-His-Shoulders-by-Lorenzo-Mediano.pdf
    • http://muicuiu.dumb1.com/1a00a04a04a01a06/Young-Shoulders-by-John-Wain.pdf
    • http://muicuiu.dumb1.com/2a07a03a04a09a03/On-My-Shoulders-New-Cloud-Heroes-The-Victorious-Score-1-by-Jon-D-Arthur.pdf
    • http://muicuiu.dumb1.com/6a06a05a08a01a03/Pictures-by-J-R-R-Tolkien-by-J-R-R-Tolkien.pdf
    • http://muicuiu.dumb1.com/6a05a02a07a06a08/On-the-Shoulders-of-Giants-The-Great-Works-of-Physics-and-Astronomy-by-Stephen-Hawking.pdf
    • http://muicuiu.dumb1.com/6a06a04a06a08a02/Les-Rois-de

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