Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f9b8e4b8728f92…

MALICIOUS

PDF

20.0 KB Created: 2019-04-30 03:58:47 +01:00 Authoring application: mPDF 5.7
MD5: 6ec708855e1c8e1bcdfd6e02bf818cb7 SHA-1: 16cee574f7f1417b4b5dddb9008382f636e6d31f SHA-256: 64f9b8e4b8728f92ac643d763af2520cdcfd8e912084b307317e1806c9f7e9dc
92 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 URLs themselves are marked as benign, the sheer volume and the heuristic firing suggest an attempt to manipulate search engine results or to distribute potentially malicious content through these links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/1092095093/Out-of-Time-Nine-Minutes-2-by-Beth-Flynn.pdf
    • http://loaminoo.linkpc.net/5095092094092099/Nine-Minutes-Nine-Minutes-1-by-Beth-Flynn.pdf
    • http://loaminoo.linkpc.net/4094095097098097/Daring-Time-by-Beth-Kery.pdf
    • http://loaminoo.linkpc.net/9090099093094091/The-Complete-Gillian-Flynn-Gone-Girl-Dark-Places-Sharp-Objects-by-Gillian-Flynn.pdf
    • http://loaminoo.linkpc.net/5097097096092097/30-Minutes-pour-perdre-du-poids-Comment-perdre-du-poids-en-30-minutes-by-Lynx.pdf
    • http://loaminoo.linkpc.net/3095098094099091/Vince-Flynn-Collectors-Edition-2-Separation-of-Power-Executive-Power-and-Memorial-Day-by-Vince-Flynn.pdf
    • http://loaminoo.linkpc.net/4099099099098093/Time-Trip-A-Time-After-Time-Reincarnation-Novella-Time-After-Time-Reincarnation-Lives-Book-1-by-Wendy-Godding.pdf
    • http://loaminoo.linkpc.net/3090097095095098/Bread-Lover-s-Bread-Machine-Cookbook-A-Master-Baker-s-300-Favorite-Recipes-for-Perfect-Every-Time-Bread-From-Every-Kind-of-Machine-by-Beth-Hensperger.pdf
    • http://loaminoo.linkpc.net/4094095098099092/The-Big-Book-Of-Time-Travel-Romance-Includes-After-Cilmeri-0-5-Lost-Highlander-1-The-McKinnon-Legends-1-Out-of-Time-1-Time-Walkers-1-by-Sarah-Woodbury.pdf
    • http://loaminoo.linkpc.net/3092091099098098/Three-in-Time-The-Winds-of-Time-The-Year-of-the-Quiet-Sun-There-Will-Be-Time-by-Chad-Oliver.pdf
    • http://loaminoo.linkpc.net/1090090090094097099/A-Few-Minutes-With-God-by-Arlena-D-Lee.pdf
    • http://loaminoo.linkpc.net/2093093099095/The-Minutes-by-Tracy-Letts.pdf
    • http://loaminoo.linkpc.net/4099092091091/Three-Minutes-More-by-Edward-R-O-39-Dell.pdf
    • http://loaminoo.linkpc.net/7093097093097/The-Seven-Minutes-by-Irving-Wallace.pdf
    • http://loaminoo.linkpc.net/1095093093/Two-Minutes-Seven-6-by-Dannika-Dark.pdf
    • http://loaminoo.linkpc.net/1093090095096093/Two-Minutes-Seven-6-by-Dannika-Dark.pdf
    • http://loaminoo.linkpc.net/2098099092092095/Five-Minutes-More-by-Darlene-Ryan.pdf
    • http://loaminoo.linkpc.net/8091097091093092/The-Time-Machine-The-Original-Time-Travel-Story-A-Short-Science-Fiction-Novel-about-Time-Travel-by-H-G-Wells.pdf
    • http://loaminoo.linkpc.net/5092096095095099/Machiavelli-in-90-Minutes-by-Paul-Strathern.pdf
    • http://loaminoo.linkpc.net/4097095097091098/Five-Minutes-Longer-Enhanced-1-by-Victoria-Sue.pdf