Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c42cbacaf50bc3…

MALICIOUS

PDF

15.3 KB Created: 2019-04-30 03:12:07 +01:00 Authoring application: mPDF 5.7 First seen: 2020-07-02
MD5: 3490ce805282e29b2ce033c9e5e69dfe SHA-1: 7b0fa7593836edbbed996562b985ffa46beee867 SHA-256: 97c42cbacaf50bc3e4042b7d20f6a7cf5342c0cdd82b2e05dbe5577162057826
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, forming a link farm. This technique is often used to distribute malicious content or to manipulate search engine rankings. While the ML classifier flagged this as malicious, the specific URLs extracted were classified as benign. No scripts were extracted from this sample. The primary attack pattern observed is the creation of a link farm to direct users to external content.

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/2a02a09a05a07a05/Dear-Cara-Letters-from-Otto-Frank-Anne-s-Father-Shares-His-Wisdom-by-Cara-Weiss-Wilson.pdf
    • http://muicuiu.dumb1.com/2a02a09a03a01a09/Dear-Anne-Frank-Poems-by-Marjorie-Agos-n.pdf
    • http://muicuiu.dumb1.com/2a02a09a04a06a04/Searching-for-Anne-Frank-Letters-from-Amsterdam-to-Iowa-by-Susan-Goldman-Rubin.pdf
    • http://muicuiu.dumb1.com/2a02a04a04a04a08/Noah-by-Cara-Dee.pdf
    • http://muicuiu.dumb1.com/5a00a04a06a01a06/Twice-the-Touch-by-Cara-Dee.pdf
    • http://muicuiu.dumb1.com/7a02a02a00a05a03/Dear-Ahmedbhai-Dear-Zuleikabehn-The-Letters-of-Zuleikha-Mayat-and-Ahmed-Kathrada-1979-1989-by-Goolam-Vahed.pdf
    • http://muicuiu.dumb1.com/2a01a00a00a06a06/Outcome-Aftermath-2-by-Cara-Dee.pdf
    • http://muicuiu.dumb1.com/2a06a03a06a02a02/The-Sun-Thief-by-Cara-St-Louis.pdf
    • http://muicuiu.dumb1.com/1a01a06a04a01a07/So-Much-Pretty-by-Cara-Hoffman.pdf
    • http://muicuiu.dumb1.com/3a00a00a06a03a03/I-ll-Be-a-Stranger-to-You-by-Cara-Diaconoff.pdf
    • http://muicuiu.dumb1.com/4a03a03a05a08a02/Don-t-Let-me-Forget-You-by-Cara-Crescent.pdf
    • http://muicuiu.dumb1.com/4a00a04a06a05a00/After-Hours-by-Cara-McKenna.pdf
    • http://muicuiu.dumb1.com/1a00a04a05a03a08a01/Running-by-Cara-Hoffman.pdf
    • http://muicuiu.dumb1.com/3a08a07a08a00a04/Terran-Breeder-2-by-Cara-Bristol.pdf
    • http://muicuiu.dumb1.com/1a01a08a06a00a00a03/Cara-and-the-Draca-by-Louisa-Kelley.pdf
    • http://muicuiu.dumb1.com/2a00a07a05a09/My-Lady-Gamester-by-Cara-King.pdf
    • http://muicuiu.dumb1.com/8a03a04a02a04a05/Accidental-Love-by-Cara-Marsi.pdf
    • http://muicuiu.dumb1.com/8a03a04a02a04a09/Love-Potion-by-Cara-Marsi.pdf
    • http://muicuiu.dumb1.com/3a00a00a02a05a02/The-Feu-Follet-by-Cara-Lege-Lyons.pdf
    • http://muicuiu.dumb1.com/3a04a09a03a04a07/Northbound-The-North-Novels-1-by-Cara-Dee.pdf

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