Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d711888d634b48…

MALICIOUS

PDF

16.2 KB Created: 2019-04-30 03:30:19 +01:00 Authoring application: mPDF 5.7
MD5: 38e5f308408b50f13f12712812a95366 SHA-1: a501ecfa4d50f3404164137b3f8e90470cd4b3d2 SHA-256: 92d711888d634b48d264e9736b581a4907052481ffba640da23c6380fa2f82ad
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDFs, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. While the specific intent of the links is unclear due to their benign reputation, the sheer volume and the heuristic firing suggest a malicious purpose. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/9098094098090097/Thus-Spoke-Zarathustra-A-Book-For-All-And-None-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/6094099090095095/Also-sprach-Zarathustra-Ein-Buch-f-r-alle-und-keinen-by-Friedrich-Wilhelm-Nietzsche-Friedrich-Nietzsche-Fritz-Koegel-Publication-date-1907-by-Friedrich-Wilhelm-Nietzsche.pdf
    • http://loaminoo.linkpc.net/3094097091097/Thus-Spake-Zarathustra-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/9098099096093098/Also-sprach-Zarathustra-Gesamtausgabe-in-4-B-nden-Ein-Buch-f-r-Alle-und-Keinen-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/2092092091093099/Basic-Writings-of-Nietzsche-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/1090095099091097091/Nietzsche-s-Zarathustra-by-Kathleen-Marie-Higgins.pdf
    • http://loaminoo.linkpc.net/1090095099093091098/Zarathustra-s-Last-Supper-Nietzsche-s-Eight-Higher-Men-by-Weaver-Santaniello.pdf
    • http://loaminoo.linkpc.net/4098092093096094/A-Nietzsche-Reader-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/8098098092093091/Nietzsche-F-r-Anf-nger-Also-Sprach-Zarathustra-Eine-Lese-Einf-hrung-by-R-diger-Schmidt.pdf
    • http://loaminoo.linkpc.net/1090093091090090090/Al-m-do-bem-e-do-mal-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/9097095094099090/Joyful-Wisdom-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/8094095097099099/Mas-alla-del-bien-y-del-mal-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/4091093096093091/Beyond-Good-And-Evil-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/3099096097092097/Twilight-of-the-Idols-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/6090099094093091/Schopenhauer-as-Educator-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/8098099094098098/Beyond-Good-and-Evil-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/2091095095093098/The-Anti-Christ-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/9099098096093095/Beyond-Good-and-Evil-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/8098097099099/The-Pre-Platonic-Philosophers-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/3096090099095/The-Anti-Christ-by-Friedrich-Nietzsche.pdf
    • http://loaminoo.linkpc.net/1090095099093091098/Zarathustra-s-Last-Supper-Nietzsche-s-Eight-Higher-Men-by-Weaver-Santa

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