Malicious PDF — malware analysis report

Static analysis result for SHA-256 7881cafaf00b1294…

MALICIOUS

PDF

16.9 KB Created: 2019-04-30 01:43:39 +01:00 Authoring application: mPDF 5.7
MD5: 0cff90e56ade737fff800976492148d9 SHA-1: 5ea763c6f119c7319fc6b788176daf79bb21e6e6 SHA-256: 7881cafaf00b12948cd35efa46c392e439ebff63cb6530282b2838e23c59d33d
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 on a dynamic DNS domain, a technique often used for SEO manipulation or to host malicious content. While no scripts were explicitly extracted, the PDF structure and the heuristic firings suggest an attempt to redirect users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/5090092090092096/Harlan-s-Pass-by-Leona-Grace.pdf
    • http://loaminoo.linkpc.net/5090092090093096/Harlan-s-Point-by-Leona-Grace.pdf
    • http://loaminoo.linkpc.net/2099099091093095/Harlan-s-Race-Harlan-s-Story-2-by-Patricia-Nell-Warren.pdf
    • http://loaminoo.linkpc.net/9098099090093093/The-Harlan-Ellison-Hornbook-Harlan-Ellison-s-Movie-Edgeworks-3-by-Harlan-Ellison.pdf
    • http://loaminoo.linkpc.net/1093095091095096/Backstage-Pass-Last-Call-The-Backstage-Pass-Rock-Star-Romance-Book-6-by-Elizabeth-Nelson.pdf
    • http://loaminoo.linkpc.net/2091091092094093/100-Hikes-In-Washington-s-South-Cascades-And-Olympics-Chinook-Pass-White-Pass-Goat-Rocks-Mount-St-Helens-Mount-Adams-by-Ira-Spring.pdf
    • http://loaminoo.linkpc.net/1093095090098095/Backstage-Pass-Behind-the-Music-The-Backstage-Pass-Rock-Star-Romance-4-by-Elizabeth-Nelson.pdf
    • http://loaminoo.linkpc.net/1093095090090095/Backstage-Pass-V-I-P-The-Backstage-Pass-Rock-Star-Romance-2-by-Elizabeth-Nelson.pdf
    • http://loaminoo.linkpc.net/9098098099095095/Troublemakers-Stories-by-Harlan-Ellison-by-Harlan-Ellison.pdf
    • http://loaminoo.linkpc.net/2095097096091096/Piper-by-Leona-Carver.pdf
    • http://loaminoo.linkpc.net/3090096098099095/Caged-Bound-2-by-Leona-Keyoko-Pink.pdf
    • http://loaminoo.linkpc.net/4090094091094098/The-Ulfric-s-Mate-War-of-the-Weres-1-by-Leona-Bushman.pdf
    • http://loaminoo.linkpc.net/1091098099094096095/Gerechtigkeit-Engelssehnsucht-4-by-Katinka-Leona-Silberschlag.pdf
    • http://loaminoo.linkpc.net/2099099096097098/Jared-Urban-Wolves-1-by-Leona-Windwalker.pdf
    • http://loaminoo.linkpc.net/1091098090095096090/Cocooned-in-Darkness-by-Leona-DeRosa-Bodie.pdf
    • http://loaminoo.linkpc.net/9090093091096/Secrets-of-the-Sands-Children-of-the-Desert-1-by-Leona-Wisoker.pdf
    • http://loaminoo.linkpc.net/7093094096095094/NEW-Eiken3-grade-at-the-top-speed-pass-NEW-Eiken3-grade-at-the-top-speed-pass-eiken3kyu-by-Takuji-Ekawa.pdf
    • http://loaminoo.linkpc.net/9098099090093091/Harlan-Ellison-s-7-Against-Chaos-by-Harlan-Ellison.pdf
    • http://loaminoo.linkpc.net/9098099090092098/The-Harlan-Ellison-Hornbook-by-Harlan-Ellison.pdf
    • http://loaminoo.linkpc.net/2096093094090/Harlan-Ellison-s-Watching-by-Harlan-Ellison.pdf