Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d9e72f3df34ec4…

MALICIOUS

PDF

26.6 KB Created: 2019-04-30 02:45:22 +01:00 Authoring application: mPDF 5.7
MD5: a03f419eb81494768c0edff4ebbbc83e SHA-1: 589697deb212b0542e14034bc2999581b3015f4e SHA-256: e4d9e72f3df34ec4661e6f3ce6c1d622d20ef54d2d5b5aa849ed8bebdd04d504
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. While many of these URLs point to what appear to be benign cookbook PDFs, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO manipulation or to mask malicious redirects. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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/8092094098091095/The-Millennium-Cookbook-Extraordinary-Vegetarian-Cuisine-by-Eric-Tucker.pdf
    • http://loaminoo.linkpc.net/1093097094093090/Lord-Krishna-s-Cuisine-The-Art-of-Indian-Vegetarian-Cooking-by-Yamuna-Devi.pdf
    • http://loaminoo.linkpc.net/3091090091098097/The-New-Farm-Vegetarian-Cookbook-by-Louise-Hagler.pdf
    • http://loaminoo.linkpc.net/3090099092094094/Simply-Heavenly-The-Monastery-Vegetarian-Cookbook-by-George-Burke.pdf
    • http://loaminoo.linkpc.net/1091094091090093098/The-Vegetarian-Athlete-s-Cookbook-More-Than-100-Delicious-Recipes-for-Active-Living-by-Anita-Bean.pdf
    • http://loaminoo.linkpc.net/1091093095095095090/The-Simply-Vegetarian-Cookbook-Fuss-Free-Recipes-Everyone-Will-Love-by-Susan-Pridmore.pdf
    • http://loaminoo.linkpc.net/9099091097097090/The-Vegetarian-Meat-amp-Potatoes-Cookbook-275-Hearty-and-Healthy-Meat-Free-Recipes-by-Robin-G-Robertson.pdf
    • http://loaminoo.linkpc.net/2095092094092092/The-British-Columbia-cookbook-by-Eric-Pateman.pdf
    • http://loaminoo.linkpc.net/6094094092099092/Le-Bernardin-Cookbook-Four-Star-Simplicity-by-Eric-Ripert.pdf
    • http://loaminoo.linkpc.net/7096099094092099/Vegetarian-Slow-Cooker-Recipes-Top-71-Quick-amp-Easy-Vegetarian-Crockpot-Recipe-Book-by-Maria-Holmes.pdf
    • http://loaminoo.linkpc.net/6091097095091096/The-Patric-Juillet-Cookbook-Practical-Gourmet-Cuisine-From-One-Of-Australia-s-Finest-Chefs-by-Patric-Juillet.pdf
    • http://loaminoo.linkpc.net/1090090090097092098/How-To-Cook-Incredible-Vegetarian-BreakFast-Fast-Easy-And-Delicious-Vegetarian-Recipes-Happy-Herbivore-Book-1-by-Ashley-Etuken.pdf
    • http://loaminoo.linkpc.net/7099094094093094/Cooking-Entrees-with-the-Micheff-Sisters-A-Vegan-Vegetarian-Cookbook-by-Micheff-Sisters.pdf
    • http://loaminoo.linkpc.net/1091097096092091091/Millennium-5-2008-Jahrbuch-Zu-Kultur-Und-Geschichte-Des-Ersten-Jahrtausends-N-Chr-Yearbook-on-the-Culture-and-History-of-the-First-Millennium-C-E-by-Wolfram-Brandes.pdf
    • http://loaminoo.linkpc.net/4090099098090090/I-Hope-They-Serve-Beer-in-Hell-Tucker-Max-1-by-Tucker-Max.pdf
    • http://loaminoo.linkpc.net/6094096094093095/Vegetarian-Cooking-Stir-Fried-Vege-Ham-and-Cabbage-in-Wasabi-Mayonnaise-Vegetarian-Cooking---Vege-Meats-Book-50-by-Wancy-Ganst.pdf
    • http://loaminoo.linkpc.net/9092098099094098/The-Appetizer-Cookbook-92-Quick-amp-Easy-CookBook-for-Health-Recipes-You-Can-Make-in-Minutes-The-Appetizer-Cookbook-by-Sehr-Ali.pdf
    • http://loaminoo.linkpc.net/6094096093099096/Vegetarian-Cooking-Konnyaku-Noodles-with-Vegetables-in-Chilli-Mayonnaise-Sauce-Vegetarian-Cooking---Konnyaku-Book-37-by-Wancy-Ganst.pdf
    • http://loaminoo.linkpc.net/8090094097094094/Classical-Lebanese-Cooking-Simple-Easy-and-Unique-Lebanese-Recipes-Lebanese-Recipes-Lebanese-Cookbook-Lebanese-Cooking-Lebanese-Cuisine-Lebanese-Food-Book-1-by-Umm-Maryam.pdf
    • http://loaminoo.linkpc.net/3090099096099090/Cooking-Light-Way-to-Cook-Vegetarian-The-Complete-Visual-Guide-to-Healthy-Vegetarian-amp-Vegan-Cooking-by-Cooking-Light-Magazine.pdf
    • http://loaminoo.linkpc.net/2095092094092092/The-

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