Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21472311fb2ef6d…

MALICIOUS

PDF

12.6 KB Created: 2019-04-30 04:45:14 +01:00 Authoring application: mPDF 5.7
MD5: 07ee32ed7b87c271da5a862a5b2482ae SHA-1: 23dbdf6f4fdb3c977d48f7afd8885b8e8411b0f1 SHA-256: d21472311fb2ef6dab92e16f87dd87332d34913552baf3da755d0837d1815915
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to book PDFs hosted on loaminoo.linkpc.net. This pattern is indicative of SEO poisoning, where malicious actors create numerous pages or documents linking to specific content to manipulate search engine rankings. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the sheer volume of links and the ML classification suggest a malicious intent, possibly to lure users to malicious sites or to distribute further malware.

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/6099098096095/Owl-Moon-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/1095093095099095/Except-the-Queen-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/4096092098091094/The-Transfigured-Hart-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/1097099092097096/Waking-Dragons-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2091098095099099/Wizard-s-Hall-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2092098093096096/How-Do-Dinosaurs-Say-I-Love-You-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/3098091097090096/Pumpkin-Baby-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/4098090096094092/Sleeping-Ugly-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2097099094099/No-Bath-Tonight-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/3090094097097099/Hush-Little-Horsie-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/1094093098098097/How-Do-Dinosaurs-Go-to-School-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/5093098091099/The-Young-Merlin-Trilogy-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2095094099096097/How-Do-Dinosaurs-Love-Their-Cats-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/1091094097099093/How-Do-Dinosaurs-Say-Good-Night-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/8090094091094099/The-Day-Tiger-Rose-Said-Goodbye-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/4094096098096099/The-Rogues-Stuart-Quartet-4-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/2093095099090094/Dragon-s-Blood-Pit-Dragons-1-by-Jane-Yolen.pdf
    • http://loaminoo.linkpc.net/5093098091099/The-Young-Merlin-Trilogy

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