Malicious PDF — malware analysis report

Static analysis result for SHA-256 810afcaac5342437…

MALICIOUS

PDF

17.8 KB Created: 2019-04-30 00:01:44 +01:00 Authoring application: mPDF 5.7
MD5: 76bb03c71ffa90493c73c13fa1710755 SHA-1: df0c50e98682344f021a7d6f4d0c451c9a70b562 SHA-256: 810afcaac534243783db08873c97fb6e9d4b79d68ad15f35468ae0cebebdddc4
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a link farm with 24 external links, all pointing to book titles hosted on the domain muicuiu.dumb1.com. This heuristic, combined with the ML classifier's high confidence, suggests a social engineering attack aiming to redirect users to potentially malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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/4a02a03a05a03a00/My-History-A-Memoir-of-Growing-Up-by-Antonia-Fraser.pdf
    • http://muicuiu.dumb1.com/1a03a09a06a00a00/The-Weaker-Vessel-by-Antonia-Fraser.pdf
    • http://muicuiu.dumb1.com/3a08a07a07a07/Marie-Antoinette-The-Journey-by-Antonia-Fraser.pdf
    • http://muicuiu.dumb1.com/4a03a05a08a08a04/The-Six-Wives-of-Henry-VIII-by-Antonia-Fraser.pdf
    • http://muicuiu.dumb1.com/5a04a09a02a09/Mary-Queen-of-Scots-by-Antonia-Fraser.pdf
    • http://muicuiu.dumb1.com/1a07a07a05a04a00/Mary-Queen-of-Scots-by-Antonia-Fraser.pdf
    • http://muicuiu.dumb1.com/7a08a07a03a09a06/The-Cavalier-Case-Jemima-Shore-7-by-Antonia-Fraser.pdf
    • http://muicuiu.dumb1.com/2a04a05a08a04a00/Perilous-Question-The-Drama-of-the-Great-Reform-Bill-1832-by-Antonia-Fraser.pdf
    • http://muicuiu.dumb1.com/5a00a02a01a09a04/Growing-Up-Amish-A-Memoir-by-Ira-Wagler.pdf
    • http://muicuiu.dumb1.com/2a09a04a02a03a04/Would-You-Rather-A-Memoir-of-Growing-Up-and-Coming-Out-by-Katie-Heaney.pdf
    • http://muicuiu.dumb1.com/3a09a00a06a05a09/Bad-Kid-A-Memoir-on-Growing-Up-Goth-amp-Gay-in-Texas-by-David-Crabb.pdf
    • http://muicuiu.dumb1.com/1a05a04a07a08a03/On-Growing-Up-Tough-An-Irreverent-Memoir-by-Taylor-Caldwell.pdf
    • http://muicuiu.dumb1.com/1a00a05a00a01a02a03/Like-Family-Growing-Up-in-Other-People-s-Houses-A-Memoir-by-Paula-McLain.pdf
    • http://muicuiu.dumb1.com/4a07a05a02a02/Funny-in-Farsi-A-Memoir-of-Growing-Up-Iranian-in-America-by-Firoozeh-Dumas.pdf
    • http://muicuiu.dumb1.com/7a07a02a06a05/A-People-s-History-Of-Britain-by-Rebecca-Fraser.pdf
    • http://muicuiu.dumb1.com/1a09a08a03a07/Dyke-Life-From-Growing-Up-To-Growing-Old-A-Celebration-Of-The-Lesbian-Experience-by-Karla-Jay.pdf
    • http://muicuiu.dumb1.com/8a05a09a03a03a04/Love-and-Revolution-A-Political-Memoir-People-s-History-of-the-Greensboro-Massacre-Its-Setting-and-Aftermath-by-Signe-Waller.pdf
    • http://muicuiu.dumb1.com/1a00a09a01a05a00a00/Growing-Agile-A-Coach-s-Guide-to-Training-Scrum-Growing-Agile-A-Coach-s-Guide-Series-Book-1-by-Karen-Greaves.pdf
    • http://muicuiu.dumb1.com/2a06a05a03a09a06/Relativity-by-Antonia-Hayes.pdf
    • http://muicuiu.dumb1.com/4a01a01a02a09a02/My-ntonia-by-Willa-Cather.pdf
    • http://muicuiu.dumb1.com/1a05a04a07a08a03/On-Growing-Up-Tough-

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