Malicious PDF — malware analysis report

Static analysis result for SHA-256 7326e530590bb562…

MALICIOUS

PDF

15.5 KB Created: 2019-04-30 04:16:27 +01:00 Authoring application: mPDF 5.7
MD5: bd4282b6670ba79dfae83b8ab4b0f2bf SHA-1: a4b766ef146b8705a63eb8d5ebc12e8b0c9f7639 SHA-256: 7326e530590bb5625360569dfe269d0332b7274ecbd132d5cebf3e466c64a964
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm of 22 external PDF documents, identified by the PDF_SEO_LINK_FARM heuristic. While the document body is unreadable, the presence of numerous embedded URLs suggests an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/6a05a06a03a05a02/Sugar-Sugar-Rune-Volume-4-Sugar-Sugar-Rune-4-by-Moyoco-Anno.pdf
    • http://muicuiu.dumb1.com/6a05a06a03a05a04/Sugar-Sugar-Rune-Volume-8-Sugar-Sugar-Rune-8-by-Moyoco-Anno.pdf
    • http://muicuiu.dumb1.com/3a08a07a02/Sugar-Rush-Sugar-Bowl-2-by-Sawyer-Bennett.pdf
    • http://muicuiu.dumb1.com/9a05a06a00a00a04/Low-Sugar-So-Simple-100-Delicious-Low-Sugar-Low-Carb-Gluten-Free-Recipes-for-Eating-Clean-and-Living-Healthy-by-Elviira-Krebber.pdf
    • http://muicuiu.dumb1.com/7a01a02a01a01a07/White-Sugar-Brown-Sugar-by-E-G-Tripp.pdf
    • http://muicuiu.dumb1.com/2a07a03a05a00a05/Sugar-Rush-Sugar-1-by-Julie-Burchill.pdf
    • http://muicuiu.dumb1.com/2a07a07a01a03a04/Sugar-Princess-Skating-To-Win-Vol-1-Sugar-Princess-1-by-Hisaya-Nakajo.pdf
    • http://muicuiu.dumb1.com/2a03a04a01a09a00/Deadly-Sugar-Deadly-Sugar-1-by-Ofelia-Gr-nd.pdf
    • http://muicuiu.dumb1.com/6a04a05a05a03a01/The-Sugar-Babies-The-Sugar-Babies-1-by-O-M-Faye.pdf
    • http://muicuiu.dumb1.com/1a00a08a04a09a00a04/FROM-SUGAR-TO-SHIT-2-by-Mr-777.pdf
    • http://muicuiu.dumb1.com/1a01a05a07a00/Sugar-Springs-Sugar-Springs-1-by-Kim-Law.pdf
    • http://muicuiu.dumb1.com/3a01a07a00a01a05/The-Chameleon-by-Sugar-Rautbord.pdf
    • http://muicuiu.dumb1.com/4a06a06a08a08a08/Sugar-for-the-Horse-by-H-E-Bates.pdf
    • http://muicuiu.dumb1.com/5a00a03a05a00a03/Sugar-Topped-by-E-Davies.pdf
    • http://muicuiu.dumb1.com/3a02a01a07a05a00/The-Bad-Boy-CEO-Destiny-1-by-Sugar-Jamison.pdf
    • http://muicuiu.dumb1.com/4a07a00a06a07a04/Year-of-No-Sugar-by-Eve-O-Schaub.pdf
    • http://muicuiu.dumb1.com/1a09a08a09a06a00/Sugar-amp-Spice-by-Saffina-Desforges.pdf
    • http://muicuiu.dumb1.com/2a02a04a06a04a06/The-Sugar-Divorce-by-Suzanna-Stinnett.pdf
    • http://muicuiu.dumb1.com/1a05a01a00a04a00/The-Sugar-House-by-Jean-Scheffler.pdf
    • http://muicuiu.dumb1.com/9a02a07a04a00/Hannah-and-Sugar-by-Kate-Berube.pdf

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