Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a13de08c7d5304…

MALICIOUS

PDF

12.5 KB Created: 2019-05-02 17:49:13 +01:00 Authoring application: mPDF 5.7
MD5: e49fb5407fa42964fddf0a77c2fa432e SHA-1: 3bca9721a81f57365a5307caa3a0333d6623dc89 SHA-256: f5a13de08c7d5304ad739347716e3b391e05a564f426f71a8e00b88362c1a1aa
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to book titles, suggesting a link farm or a lure for users to click on potentially malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

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/1095093095099095/Except-the-Queen-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/1094093098098097/How-Do-Dinosaurs-Go-to-School-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/1098095096099096/The-Magic-Three-of-Solatia-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/1097099092097096/Waking-Dragons-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/4098090096094092/Sleeping-Ugly-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/3098091097090096/Pumpkin-Baby-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2097099094099/No-Bath-Tonight-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/4096092098091094/The-Transfigured-Hart-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/3097094092096091/The-Magic-Three-of-Solatia-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/3090094097097099/Hush-Little-Horsie-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2092098093096096/How-Do-Dinosaurs-Say-I-Love-You-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2091098095099099/Wizard-s-Hall-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2096094090090/Dragonfield-and-Other-Stories-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/1090092090092096099/Afternoon-of-a-Faun-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2095094099096097/How-Do-Dinosaurs-Love-Their-Cats-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/4094096098096099/The-Rogues-Stuart-Quartet-4-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/5093098091099/The-Young-Merlin-Trilogy-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/8090094091094099/The-Day-Tiger-Rose-Said-Goodbye-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/5090098091098090/Here-s-a-Little-Poem-A-Very-First-Book-of-Poetry-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/1091094097099093/How-Do-Dinosaurs-Say-Good-Night-by-Jane-Yolen.pdf

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