Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f0b49298b9ff35…

MALICIOUS

PDF

15.4 KB Created: 2019-04-30 05:40:43 +01:00 Authoring application: mPDF 5.7
MD5: f2cfc28492053c96abcb60a1f6ac32c3 SHA-1: 3a49d8943e6457cd055d751c47d4f12f8c737d06 SHA-256: 31f0b49298b9ff35f21ee49aec238c447d07b0f0da9cf00240039f6490854f6d
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute further malicious content. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the PDF structure itself is indicative of a malicious lure. The primary attack pattern involves directing users to a large number of external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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://muicuiu.dumb1.com/1a04a08a02a06a03/His-Challenging-Lover-The-Thorpe-Brothers-4-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/1a04a08a02a03a09/His-Secretive-Lover-The-Thorpe-Brothers-3-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/4a08a03a05a03a06/The-Sheik-s-Virgin-Lover-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/9a09a02a06a08a05/The-Russian-s-Tender-Lover-The-Sisterhood-3-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/1a07a04a05a02a06/Trapped-By-Desire-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/3a02a09a07a01a09/The-Tycoon-s-Misunderstood-Bride-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/1a07a04a08a06a06/Falling-For-The-Boss-The-Attracelli-Family-2-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/1a07a04a06a04a03/The-Tycoon-s-Defiant-Southern-Belle-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/1a07a04a06a07a07/Intimate-Desires-The-Love-and-Danger-Series-1-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/2a02a09a09a03a05/The-Greek-s-Forgotten-Wife-The-Boarding-School-Series-1-by-Elizabeth-Lennox.pdf
    • http://muicuiu.dumb1.com/1a02a00a06a07/Somebody-s-Lover-The-Jackson-Brothers-1-by-Jasmine-Haynes.pdf
    • http://muicuiu.dumb1.com/2a09a04a01a03a01/Lennox-Lennox-1-by-Craig-Russell.pdf
    • http://muicuiu.dumb1.com/7a04a05a05a06a06/Elizabeth-Taylor-The-Lady-the-Lover-the-Legend-1932-2011-by-David-Bret.pdf
    • http://muicuiu.dumb1.com/1a01a02a04a03a05/Forever-Mine-The-Moreno-Brothers-1-by-Elizabeth-Reyes.pdf
    • http://muicuiu.dumb1.com/8a04a06a04a00/The-Lover-The-Lover-1-by-Robin-Schone.pdf
    • http://muicuiu.dumb1.com/6a05a08a00a00/My-Lover-s-Lover-by-Maggie-O-39-Farrell.pdf
    • http://muicuiu.dumb1.com/2a07a03a00a07a07/Challenging-the-Doctor-by-Patricia-W-Fischer.pdf
    • http://muicuiu.dumb1.com/2a03a04a04/Challenging-Saber-The-Alliance-4-by-S-E-Smith.pdf
    • http://muicuiu.dumb1.com/5a00a04a01a07a01/Discipline-with-Dignity-for-Challenging-Youth-by-Allen-N-Mendler.pdf
    • http://muicuiu.dumb1.com/1a00a00a09a03a08a05/The-Politics-of-Panem-Challenging-Genres-by-Sean-P-Connors.pdf
    • http://muicuiu.dumb1.com/1a02a00a06a07/Some

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