Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2c5b12617d245b…

MALICIOUS

PDF

26.5 KB Created: 2019-05-03 03:33:38 +01:00 Authoring application: mPDF 5.7
MD5: ef591a1bee9c8222b9382bdf310e4a9f SHA-1: b135ab3f8a0561b77f869b7be132bc608db6bb73 SHA-256: 7c2c5b12617d245b83791291b3d93c19f3707e661eec6682b6e5bb24399be50b
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. While many of these URLs were classified as benign, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO manipulation or to redirect users to malicious content. The ML classifier also flagged this PDF with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9695

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/2a00a01a02a05a01/The-Dialectical-Imagination-A-History-of-the-Frankfurt-School-amp-the-Institute-of-Social-Research-1923-50-by-Martin-Jay.pdf
    • http://muicuiu.dumb1.com/4a00a00a01a02a03/The-Incredible-Martin-O-Shea-A-Kids-Book-about-How-to-Help-a-Child-with-a-Big-Imagination-Understand-Why-and-How-to-Study-in-School-by-Don-M-Winn.pdf
    • http://muicuiu.dumb1.com/1a00a06a03a08a01a08/Urbaner-Freiraum-in-Frankfurt-Am-Main-Parkanlage-in-Frankfurt-Am-Main-Platz-in-Frankfurt-Am-Main-Strasse-in-Frankfurt-Am-Main-Zeil-by-Source-Wikipedia.pdf
    • http://muicuiu.dumb1.com/4a04a09a01a05a06/Careers-As-A-Food-Chemist-Science-Technology-by-Institute-For-Career-Research-Chicago.pdf
    • http://muicuiu.dumb1.com/5a08a03a05a04a08/International-Workshop-on-Research-Issues-on-Data-Engineering-by-Institute-of-Electrical-and-Electronics-Engineers.pdf
    • http://muicuiu.dumb1.com/8a07a07a03a00a09/The-Mecklenburger-1923-Vol-1-Snips-and-Cuts-23-by-Charlotte-High-School.pdf
    • http://muicuiu.dumb1.com/6a05a00a02a07a00/Hospitals-and-Sanatoriums-of-the-Homoeopathic-School-of-Medicine-by-American-Institute-of-Homeopathy-Counci.pdf
    • http://muicuiu.dumb1.com/3a08a05a08a02a04/Principles-and-Methods-of-Social-Research-by-William-D-Crano.pdf
    • http://muicuiu.dumb1.com/7a02a02a01a08a09/Frontiers-of-Social-Research-Japan-and-Beyond-by-Akira-Furukawa.pdf
    • http://muicuiu.dumb1.com/1a01a09a05a01a07a08/Feminist-Methods-in-Social-Research-by-Shulamit-Reinharz.pdf
    • http://muicuiu.dumb1.com/1a00a09a02a00a07a03/Gesamtausgabe-Abteilung-II-Vorlesungen-1923-44-Band-27-Einleitung-in-die-Philosophie-by-Martin-Heidegger.pdf
    • http://muicuiu.dumb1.com/6a00a04a07a04a02/Research-in-Social-Problems-and-Public-Policy-by-Susan-Maret.pdf
    • http://muicuiu.dumb1.com/6a07a06a01a08a09/Conceptualizing-Culture-in-Social-Movement-Research-by-Britta-Baumgarten.pdf
    • http://muicuiu.dumb1.com/1a01a01a09a00a05a08/Studying-Social-Networks-A-Guide-to-Empirical-Research-by-Marina-Hennig.pdf
    • http://muicuiu.dumb1.com/9a07a09a02a07a09/Handbook-of-Research-on-Effective-Advertising-Strategies-in-the-Social-Media-Age-by-Nurdan-Oncel-Ta-K-Ran.pdf
    • http://muicuiu.dumb1.com/8a02a04a05a04a02/Handbook-of-Religion-and-Spirituality-in-Social-Work-Practice-and-Research-by-Sana-Loue.pdf
    • http://muicuiu.dumb1.com/1a00a06a04a09a03a01/Salsa-Dancing-Into-the-Social-Sciences-Research-in-an-Age-of-Info-Glut-by-Kristin-Luker.pdf
    • http://muicuiu.dumb1.com/8a09a09a08a07a02/Hellenism-and-the-Postcolonial-Imagination-by-Martin-McKinse.pdf
    • http://muicuiu.dumb1.com/7a03a06a08a02a04/The-Ottoman-Turks-An-Introductory-History-to-1923-by-Justin-A-McCarthy.pdf
    • http://muicuiu.dumb1.com/1a01a09a05a02a02a06/On-Becoming-a-Social-Scientist-From-Survey-Research-and-Participant-Observation-to-Experimental-Analysis-by-Shulamit-Reinharz.pdf