Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8b716431728cf3…

MALICIOUS

PDF

15.4 KB Created: 2019-05-02 18:08:06 +01:00 Authoring application: mPDF 5.7
MD5: 2f190c24a9cad31b5132459dbbfc3255 SHA-1: ca68553f40ba9a58bb1ae3cd97c7e3a4b3b55554 SHA-256: 1d8b716431728cf3c879e7947eb70834545d4ab8f294a7e3f86bcab7b205d88e
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning or to create link farms. The ML classifier strongly indicated maliciousness. While the specific intent of these links is not explicitly stated, the sheer volume and the heuristic firing suggest a malicious attempt to direct users to potentially harmful content or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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/4098090099099098/The-Paris-Review-Interviews-II-Wisdom-from-the-World-s-Literary-Masters-by-The-Paris-Review.pdf
    • http://loaminoo.linkpc.net/1099097093091099/The-Prophecy-of-Trivine-by-Tnahsin-Garg.pdf
    • http://loaminoo.linkpc.net/4090098097094099/I-m-not-twenty-four-I-ve-been-nineteen-for-five-years-by-Sachin-Garg.pdf
    • http://loaminoo.linkpc.net/8094093098096094/Elements-of-Distributed-Computing-by-Vijay-K-Garg.pdf
    • http://loaminoo.linkpc.net/6090098095096/A-Half-Baked-Love-Story-by-Anurag-Garg.pdf
    • http://loaminoo.linkpc.net/1091097098099099092/Themis-Texas-Bar-Review-Set-2014-2015-by-Themis-Bar-Review.pdf
    • http://loaminoo.linkpc.net/1090094091098091096/Child-Adolescent-Mental-Health-CNS-Review-Child-Adolescent-Nurse-Review-Book-1-by-Kathleen-Courtney.pdf
    • http://loaminoo.linkpc.net/8095092096091090/Tropical-Pathology-by-Wilhelm-Doerr.pdf
    • http://loaminoo.linkpc.net/9097091091094094/Ocular-Pathology-by-Myron-Yanoff.pdf
    • http://loaminoo.linkpc.net/1091094096095096090/National-Board-of-Review-Magazine-by-National-Board-of-Review-of-Motion-Pictu.pdf
    • http://loaminoo.linkpc.net/1090090091090096095/Forensic-Pathology-Reviews-by-Michael-Tsokos.pdf
    • http://loaminoo.linkpc.net/1090099092094091094/Pathology-of-the-Stomach-and-Duodenum-by-Heidrun-Rotterdam.pdf
    • http://loaminoo.linkpc.net/1090090090098097091/Forensic-Pathology-Reviews-Vol-4-by-Michael-Tsokos.pdf
    • http://loaminoo.linkpc.net/1090090090099092099/Forensic-Pathology-Reviews-Vol-6-by-Michael-Tsokos.pdf
    • http://loaminoo.linkpc.net/1090090090098094093/Forensic-Pathology-Reviews-Vol-3-by-Michael-Tsokos.pdf
    • http://loaminoo.linkpc.net/1090090090098093099/Forensic-Pathology-Reviews-5-by-Michael-Tsokos.pdf
    • http://loaminoo.linkpc.net/7093097098091095/Pathology-of-Lying-Accusation-and-Swindling-by-William.pdf
    • http://loaminoo.linkpc.net/9098091094096098/Concepts-of-Genetics-by-Klug.pdf
    • http://loaminoo.linkpc.net/1091091093097098094/Atlas-on-the-Human-Testis-Normal-Morphology-and-Pathology-by-Davor-Jeziek.pdf
    • http://loaminoo.linkpc.net/9098091093094091/Essentials-of-Genetics-by-William-S-Klug.pdf
    • http://loaminoo.linkpc.net/1090090091090096095/Forensic-Pathology-Reviews-

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