Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca256e838a20db80…

MALICIOUS

PDF

13.8 KB Created: 2019-04-30 02:31:48 +01:00 Authoring application: mPDF 5.7
MD5: c780b986f73419a9fdbab41681d74434 SHA-1: b47348284db2e10b84f95a95decc81691324d39e SHA-256: ca256e838a20db80373fb597d6d5ed70eb60653b669b079b89d7400038d5dc8f
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier also flagged this PDF as malicious. While the specific intent beyond linking is unclear due to the lack of executable scripts, the sheer volume of links and the suspicious domain suggest a malicious distribution or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8721

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://muicuiu.dumb1.com/9a06a02a02a01a09/Sakura-Hime-The-Legend-of-Princess-Sakura-Vol-4-by-Arina-Tanemura.pdf
    • http://muicuiu.dumb1.com/9a06a02a02a06a05/Sakura-Hime-The-Legend-of-Princess-Sakura-Vol-11-by-Arina-Tanemura.pdf
    • http://muicuiu.dumb1.com/9a06a02a02a01a08/Sakura-Hime-The-Legend-of-Princess-Sakura-Vol-3-by-Arina-Tanemura.pdf
    • http://muicuiu.dumb1.com/4a05a05a00a00a05/Cardcaptor-Sakura-Master-of-the-Clow-Vol-5-Cardcaptor-Sakura-11-by-CLAMP.pdf
    • http://muicuiu.dumb1.com/4a05a04a07a07a01/Cardcaptor-Sakura-Master-of-the-Clow-Vol-2-Cardcaptor-Sakura-8-by-CLAMP.pdf
    • http://muicuiu.dumb1.com/4a09a07a02a01/Cardcaptor-Sakura-Master-of-the-Clow-Vol-1-Cardcaptor-Sakura-7-by-CLAMP.pdf
    • http://muicuiu.dumb1.com/4a08a05a00a07a09/The-Ark-Sakura-by-K-b-Abe.pdf
    • http://muicuiu.dumb1.com/1a00a07a00a01a03a01/SAKURA-by-Kiharu-Kamimura.pdf
    • http://muicuiu.dumb1.com/1a09a03a05a04a08/Cardcaptor-Sakura-Book-1-by-CLAMP.pdf
    • http://muicuiu.dumb1.com/4a06a00a05a05a07/Cardcaptor-Sakura-Book-4-by-CLAMP.pdf
    • http://muicuiu.dumb1.com/1a01a00a09a03a05a08/Mythical-Detective-Loki-Vol-05-by-Sakura-Kinoshita.pdf
    • http://muicuiu.dumb1.com/1a01a00a09a03a04a09/Mythical-Detective-Loki-Vol-02-by-Sakura-Kinoshita.pdf
    • http://muicuiu.dumb1.com/9a00a09a09a04/Falling-for-Sakura-A-Secret-Kiss-by-Alexia-Praks.pdf
    • http://muicuiu.dumb1.com/6a01a03a09a07a03/Sakura-tenshi-no-hikari---Episode-5-by-Jonathan-Lawrence.pdf
    • http://muicuiu.dumb1.com/6a06a03a02a09a05/--Sakura-no-Ame-Bokura-wa-Koko-de-Aou-by-Hitomi-Amamiya.pdf
    • http://muicuiu.dumb1.com/6a01a09a08a00a07/Naruto-Sakura-s-Story-Naruto-Novels-by-Masashi-Kishimoto.pdf
    • http://muicuiu.dumb1.com/9a06a00a05a09a08/Potomakku-No-Sakura-Tsugaru-No-Gaikokan-Chinda-Fusai-Monogatari-Cherry-Blossoms-On-The-Potomac-A-Tale-Of-Two-Japanese-Diplomats-From-Tsugaru-by-Katsuhisa-Tonosaki.pdf

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