Malicious PDF — malware analysis report

Static analysis result for SHA-256 3704d0452bfe3c69…

MALICIOUS

PDF

26.2 KB Created: 2019-04-30 04:08:36 +01:00 Authoring application: mPDF 5.7
MD5: ad176c1c5ef2f29865c65387cc8e1877 SHA-1: 996ef1421f52448b4fa7eb4aff210a546011415b SHA-256: 3704d0452bfe3c69389ee62cde4aad4f4f56254a46f89b6374bf8b24f3ca9023
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While most of these links point to what appear to be benign academic papers, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO manipulation or to host further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://xiixmcuin.linkpc.net/6209201203200200/Modern-C-Design-Generic-Programming-and-Design-Patterns-Applied-by-Andrei-Alexandrescu.pdf
    • http://xiixmcuin.linkpc.net/8207206207202200/Development-of-a-Generic-Flash-Device-Driver-for-Cellular-Phones---Requirements-Design-Implementation-by-Sebastian-Rockel.pdf
    • http://xiixmcuin.linkpc.net/8203200202201209/Java-Programming-From-Problem-Analysis-To-Program-Design-by-D-S-Malik.pdf
    • http://xiixmcuin.linkpc.net/8203200202203204/C-Programming-Program-Design-Including-Data-Structures-by-D-S-Malik.pdf
    • http://xiixmcuin.linkpc.net/1202202207204209/How-to-Design-Programs-An-Introduction-to-Programming-and-Computing-by-Matthias-Felleisen.pdf
    • http://xiixmcuin.linkpc.net/1200205209206200209/Flower-Bird-Traditional-Patterns-in-Japanese-Design-by-Nobuyoshi-Hamada.pdf
    • http://xiixmcuin.linkpc.net/1200205209205208206/Cherry-Blossoms-Traditional-Patterns-in-Japanese-Design-by-Nobuyoshi-Hamada.pdf
    • http://xiixmcuin.linkpc.net/1202202207202202/Design-Patterns-Elements-of-Reusable-Object-Oriented-Software-by-Erich-Gamma.pdf
    • http://xiixmcuin.linkpc.net/1200205209208202208/Animal-Bird-Insect-Fish-Traditional-Patterns-in-Japanese-Design-by-Nobuyoshi-Hamada.pdf
    • http://xiixmcuin.linkpc.net/7202207204202205/Fingerprint-The-Art-of-Using-Hand-Made-Elements-in-Graphic-Design-by-Chen-Design-Associates.pdf
    • http://xiixmcuin.linkpc.net/1200201200203205/Change-by-Design-How-Design-Thinking-Transforms-Organizations-and-Inspires-Innovation-by-Tim-Brown.pdf
    • http://xiixmcuin.linkpc.net/1200206203209202209/The-Design-of-Everyday-Things-Psychologie-und-Design-der-allt-glichen-Dinge-by-Donald-A-Norman.pdf
    • http://xiixmcuin.linkpc.net/1200201205207207/The-Design-of-Business-Why-Design-Thinking-is-the-Next-Competitive-Advantage-by-Roger-L-Martin.pdf
    • http://xiixmcuin.linkpc.net/8204206207207206/The-Design-of-Sites-Patterns-Principles-and-Proceses-for-Crafting-a-Customer-Centered-Web-Experience-by-Douglas-K-van-Duyne.pdf
    • http://xiixmcuin.linkpc.net/6202209200201205/The-Language-of-Graphic-Design-An-Illustrated-Handbook-for-Understanding-Fundamental-Design-Principles-by-Richard-Poulin.pdf
    • http://xiixmcuin.linkpc.net/5204208200206204/Design-for-Inclusivity-A-Practical-Guide-to-Accessible-Innovative-and-User-Centred-Design-by-Roger-Coleman.pdf
    • http://xiixmcuin.linkpc.net/9205202206209209/The-Sources-of-Modern-Architecture-and-Design-by-Nikolaus-Pevsner.pdf
    • http://xiixmcuin.linkpc.net/2202209200207/The-Ultimate-Fashion-Study-Guide---The-Design-Process-How-to-Generate-Inspiration-and-Produce-Grade-a-Fashion-Design-Projects-by-Victoria-Hunter.pdf
    • http://xiixmcuin.linkpc.net/7207200204206201/Fashion-Interior-Design-and-the-Contours-of-Modern-Identity-by-Alla-Myzelev.pdf
    • http://xiixmcuin.linkpc.net/7204206204200205/Crafting-a-Modern-World-The-Architecture-and-Design-of-Antonin-and-No-mi-Raymond-by-William-Whitaker.pdf
    • http://xiixmcuin.linkpc.net/12

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