Malicious PDF — malware analysis report

Static analysis result for SHA-256 04134d12f3fa2add…

MALICIOUS

PDF

14.2 KB Created: 2019-05-05 15:50:43 +01:00 Authoring application: mPDF 5.7
MD5: 3f2191df0f6280b0bcf72068233151c2 SHA-1: da4f41ba7d2432bc0339edaa002525f06c7413d3 SHA-256: 04134d12f3fa2add0687e96261904115aa0f0d6632bf1f45b1cd4c82fea611f8
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to host malicious content. The ML classifier also flagged this PDF as malicious. While the specific intent of the linked PDFs is unclear, the sheer volume and the heuristic firing suggest a malicious attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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://loaminoo.linkpc.net/1099090096090094/Deck-the-Halls-Regan-Reilly-Mysteries-4-5-by-Carol-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/2096096092098090/Wrecked-Regan-Reilly-Mysteries-13-by-Carol-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/2098096096097090/Iced-Regan-Reilly-Mysteries-3-by-Carol-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/2097093097095092/Cursed-Regan-Reilly-Mysteries-12-by-Carol-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/6090092099091093/Fleeced-Regan-Reilly-Mysteries-5-by-Carol-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/6090092099091096/Jinxed-Regan-Reilly-Mysteries-6-by-Carol-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/6090092099091098/Gypped-Regan-Reilly-Mystery-15-by-Carol-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/6090093090094096/Regan-O-Reilly-PI-Comes-Home-Regan-O-Reilly-3-by-Margaret-Lake.pdf
    • http://loaminoo.linkpc.net/5090092098099090/Deck-the-Halls-by-Veronica-Vasylenko.pdf
    • http://loaminoo.linkpc.net/5090092098094099/Cat-Deck-the-Halls-Joe-Grey-13-by-Shirley-Rousseau-Murphy.pdf
    • http://loaminoo.linkpc.net/5093095091096095/Cat-Deck-the-Halls-Joe-Grey-13-by-Shirley-Rousseau-Murphy.pdf
    • http://loaminoo.linkpc.net/6098091099091095/The-Classic-Clark-Collection-by-Mary-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/2096098099095/Mary-Higgins-Clark-Presents-Malice-Domestic-Malice-Domestic-2-by-Mary-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/2096096094093093/Where-Are-You-Now-A-Novel-by-Mary-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/2096091098096096/I-ll-Be-Seeing-You-by-Mary-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/5094098097/All-By-Myself-Alone-by-Mary-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/2096095099097097/Stillwatch-by-Mary-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/1098096098095093/I-ll-Walk-Alone-by-Mary-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/3094092090097090/Before-I-Say-Good-Bye-by-Mary-Higgins-Clark.pdf
    • http://loaminoo.linkpc.net/3099099095097/All-Around-the-Town-by-Mary-Higgins-Clark.pdf

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