Malicious PDF — malware analysis report

Static analysis result for SHA-256 773b600e605d57b1…

MALICIOUS

PDF

24.4 KB Created: 2019-05-01 09:14:07 +01:00 Authoring application: mPDF 5.7
MD5: a6f82c217af46398b8c0f2bbb5619ffd SHA-1: 195758015ba8aef80566a2fe618668bba21b7bab SHA-256: 773b600e605d57b1f1c8aef9259ddfc7418fc5a73945ca35f6bf484a041afe7d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier also flagged this PDF as malicious. While the URLs themselves are labeled as benign, the sheer volume and the heuristic firing indicate a malicious intent to manipulate search results or distribute further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://unieoooq.linkpc.net/54e34e14e24e54e8/Romeo-And-Juliet-Original-Text-And-Facing-Pages-Translation-Into-Contemporary-English-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/54e34e14e24e94e7/A-Midsummer-Night-s-Dream-A-Facing-Pages-Translation-Into-Contemporary-English-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/64e04e94e74e74e8/Romeo-and-Juliet-Original-Text-of-Masuccio-Salernitano-Luigi-Da-Porto-Matteo-Bandello-William-Shakespeare-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/54e34e44e74e14e6/Romeo-amp-Juliet-The-Easy-Way-Original-amp-Modern-Translation-Chapter-Summaries-amp-Trivia-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/14e14e34e04e44e04e1/Romeo-and-Juliet-The-Complete-Text-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/84e64e24e14e34e6/Romeo-und-Julia-Romeo-and-Juliet-Zweisprachig-Englisch-Deutsch-ebook-Seite-f-r-Seite-Bilingual-English-German-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/54e34e14e24e14e4/Romeo-and-Juliet-German-Learning-Edition-with-Paragraph-By-Paragraph-Translation-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/14e04e64e54e64e84e7/Romeo-and-Juliet---Romeo-und-Julia-von-William-Shakespeare-K-nigs-Erl-uterungen-Textanalyse-und-Interpretation-mit-ausf-hrlicher-Inhaltsangabe-und-Abituraufgaben-mit-L-sungen-by-Tamara-Kutscher.pdf
    • http://unieoooq.linkpc.net/74e34e64e74e04e8/Shakespeare-Romeo-And-Juliet-Total-Study-Edition-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/84e74e14e34e44e1/Shakespeare-Tragedy-of-Romeo-and-Juliet-1879-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/64e04e74e14e74e7/An-English-Translation-of-the-Sushruta-Samhita-Based-on-Original-Sanskrit-Text-Edited-and-Published-by-Kaviraj-Kunja-Lal-Bhishagratna-with-a-Full-and-Comprehensive-Introd-Translation-of-Different-Readings-Notes-Comperative-Views-Index-Glossary-an-by-Su-ruta.pdf
    • http://unieoooq.linkpc.net/54e64e64e44e24e9/Romeo-and-Juliet-no-fear-shakespeare-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/54e34e64e64e24e4/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/74e74e14e34e24e6/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/54e44e04e34e84e4/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/94e34e04e44e44e3/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/74e24e14e44e34e3/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/44e24e84e64e74e9/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/94e44e74e34e44e7/Romeo-and-Juliet-by-William-Shakespeare.pdf
    • http://unieoooq.linkpc.net/54e44e24e34e94e6/Romeo-and-Juliet-by-William-Shakespeare.pdf