Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b12dcc213d87a7…

MALICIOUS

PDF

16.4 KB Created: 2019-05-05 14:25:11 +01:00 Authoring application: mPDF 5.7
MD5: ecc0e20a59561efdd3faf16564cb23ca SHA-1: a88028a33603412bbff7ee07a08d99b4818dff8b SHA-256: 77b12dcc213d87a7f41e162894e9c22b22d4725f03bb549915e167b029a23a6d
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a PDF link farm. While the document body is heavily obfuscated, the heuristic 'PDF_SEO_LINK_FARM' indicates a malicious intent to direct users to numerous external PDF files. 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 0.9811

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/1a02a06a00a00a01/Devils-amp-Thieves-Devils-amp-Thieves-1-by-Jennifer-Rush.pdf
    • http://muicuiu.dumb1.com/4a01a08a04a05a00/-devils-and-realist-1-Makai-Ouji-Devils-and-Realist-1-Devils-and-Realist-1-by-Madoka-Takadono.pdf
    • http://muicuiu.dumb1.com/5a00a06a05a09a06/Men-to-Devils-Devils-to-Men-Japanese-War-Crimes-and-Chinese-Justice-by-Barak-Kushner.pdf
    • http://muicuiu.dumb1.com/8a06a01a06a05a02/Devils-with-Wings-The-Green-Devils-Assault-on-Fort-Eben-Emael-by-Harvey-Black.pdf
    • http://muicuiu.dumb1.com/2a05a05a01a03a03/Tigers-and-Devils-Tigers-and-Devils-1-by-Sean-Kennedy.pdf
    • http://muicuiu.dumb1.com/3a05a04a09a01a01/The-Smoke-Thieves-The-Smoke-Thieves-1-by-Sally-Green.pdf
    • http://muicuiu.dumb1.com/8a05a07a05/Dance-of-Thieves-Dance-of-Thieves-1-by-Mary-E-Pearson.pdf
    • http://muicuiu.dumb1.com/2a07a03a01a07a01/Rules-for-Thieves-Rules-for-Thieves-1-by-Alexandra-Ott.pdf
    • http://muicuiu.dumb1.com/1a04a07a03a05a04/The-Seven-Devils-by-Sara-Danvers.pdf
    • http://muicuiu.dumb1.com/3a05a04a04a06/The-Old-Devils-by-Kingsley-Amis.pdf
    • http://muicuiu.dumb1.com/2a01a03a09a03a03/Of-Iron-and-Devils-by-B-H-Young.pdf
    • http://muicuiu.dumb1.com/2a03a01a08a08a05/The-Old-Devils-by-Kingsley-Amis.pdf
    • http://muicuiu.dumb1.com/3a02a00a08a03a00/The-Merry-Devils-by-Edward-Marston.pdf
    • http://muicuiu.dumb1.com/1a04a01a00a03a07/The-Tomb-of-the-Devils-by-Michael-D-Christensen.pdf
    • http://muicuiu.dumb1.com/9a08a03a05a07a05/Ric-A-Dam-Doo-The-Snow-Devils-by-Wayne-A-D-Kerr.pdf
    • http://muicuiu.dumb1.com/3a00a08a04a08a04/The-Devils-Cradle-by-Darcy-Daniel.pdf
    • http://muicuiu.dumb1.com/3a09a08a09a07a07/Becoming-Raven-s-Man-Red-Devils-MC-7-by-Michelle-Woods.pdf
    • http://muicuiu.dumb1.com/4a00a09a00a06/The-Devils-of-Loudun-by-Aldous-Huxley.pdf
    • http://muicuiu.dumb1.com/4a04a06a04a04a02/The-Pig-Devils-Demonworld-2-by-Kyle-B-Stiff.pdf
    • http://muicuiu.dumb1.com/4a05a06a04a03a03/No-Second-Thoughts-Seven-Devils-MC-2-by-Candice-Owen.pdf

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