Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97f1d03dfabdd70…

MALICIOUS

PDF

16.2 KB Created: 2019-04-30 18:55:49 +01:00 Authoring application: mPDF 5.7
MD5: f42edce7da66d86086ccae543c11fa41 SHA-1: 58724ed9e97a8f1fe72ebfb931c03cb41bb58ddd SHA-256: a97f1d03dfabdd70a36bb213673090e73ca44d74fb191dc2e82909039ecf8778
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDFs, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. While the specific intent of the links is unclear due to their 'confirmed_benign' reputation, the sheer volume and the heuristic firing suggest a malicious intent to redirect users to potentially harmful sites.

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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