Malicious PDF — malware analysis report

Static analysis result for SHA-256 773ec22b582b2f2b…

MALICIOUS

PDF

14.5 KB Created: 2019-05-07 08:31:03 +01:00 Authoring application: mPDF 5.7
MD5: 156e54ab71f7b4b9f9ce5548ed25d89a SHA-1: 8d900c9b63016684383d4d1c3732786888510753 SHA-256: 773ec22b582b2f2b56c77621e441a599e26b58de59a0cebb8172259f17f06ad3
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified as a link farm. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to manipulate search engine results or direct users to potentially malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/1a06a03a00a03a04/Birdwoman-Memoirs-of-a-Lovesick-Siren-Diaries-of-a-Siren-Volume1-by-Anne-Carlisle.pdf
    • http://muicuiu.dumb1.com/5a00a05a04a01/The-Siren-s-Tale-Home-Schooling-2-by-Anne-Carlisle.pdf
    • http://muicuiu.dumb1.com/6a01a09a02a08a06/The-Siren-s-Touch-Siren-1-by-Amber-Belldene.pdf
    • http://muicuiu.dumb1.com/1a03a03a03a02a00/Siren-Siren-1-by-Tricia-Rayburn.pdf
    • http://muicuiu.dumb1.com/6a01a09a02a06a02/When-the-Siren-Cries-The-Siren-2-by-Tom-Barry.pdf
    • http://muicuiu.dumb1.com/2a02a01a09a01a03/The-Siren-s-Cry-The-Otherworldlies-2-by-Jennifer-Anne-Kogler.pdf
    • http://muicuiu.dumb1.com/6a01a09a02a07a09/Dark-Siren-Dark-Siren-1-by-Eden-Ashley.pdf
    • http://muicuiu.dumb1.com/5a01a08a03a02/Storm-Siren-Storm-Siren-1-by-Mary-Weber.pdf
    • http://muicuiu.dumb1.com/7a06a02a00a09/The-Siren-by-Kiera-Cass.pdf
    • http://muicuiu.dumb1.com/1a07a08a02a03a06/Siren-by-John-Everson.pdf
    • http://muicuiu.dumb1.com/1a01a06a08a08a01a09/Siren-of-the-Sea-by-Tamora-Rose.pdf
    • http://muicuiu.dumb1.com/3a00a02a09a05a04/Siren-s-Call-by-Debbie-Herbert.pdf
    • http://muicuiu.dumb1.com/4a00a01a06a05a03/The-Siren-Dark-Chemistry-1-by-Meg-Xuemei-X.pdf
    • http://muicuiu.dumb1.com/1a09a04a04a04a03/The-Siren-and-The-Specter-by-Jonathan-Janz.pdf
    • http://muicuiu.dumb1.com/9a02a03a04a07a00/Siren-s-Rune-by-Cory-Baxter.pdf
    • http://muicuiu.dumb1.com/6a03a02a07a00a06/Soul-Siren-by-Aisha-Duquesne.pdf
    • http://muicuiu.dumb1.com/3a08a02a00a02a02/Siren-Sisters-by-Dana-Langer.pdf
    • http://muicuiu.dumb1.com/6a04a08a08a07a06/Siren-s-Reckoning-Operation-El-1-by-J-Johanis.pdf
    • http://muicuiu.dumb1.com/1a00a08a06a05a00/The-Siren-s-Call-by-Glen-Fletcher.pdf
    • http://muicuiu.dumb1.com/2a01a04a01a05a01/Sea-God-s-Siren-The-Brother-s-Keep-2-by-Tessa-Stockton.pdf

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