Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f254e693d873cb…

MALICIOUS

PDF

14.9 KB Created: 2019-04-30 03:19:19 +01:00 Authoring application: mPDF 5.7
MD5: 3932a532b92b0d9109fd9bf3a1e310be SHA-1: 2623fb28706e7c38563186ba83d24b977b94b6a2 SHA-256: 95f254e693d873cbc14b1129b73b03bc8e1020b867ec9877a0aa3e6606cee3be
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. While most of these URLs point to benign book titles, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO spam or to mask malicious redirects. The ML classifier also flagged the PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/1a00a04a08a07a01/The-Last-Supper-Paul-Christopher-5-by-Charles-McCarry.pdf
    • http://muicuiu.dumb1.com/6a06a03a05a05a05/Christopher-s-Ghosts-Paul-Christopher-10-by-Charles-McCarry.pdf
    • http://muicuiu.dumb1.com/1a00a04a05a06a03/Second-Sight-Paul-Christopher-7-by-Charles-McCarry.pdf
    • http://muicuiu.dumb1.com/7a01a01a09a01a01/Shelley-s-Heart-Paul-Christopher-8-by-Charles-McCarry.pdf
    • http://muicuiu.dumb1.com/1a09a04a00a07a03/The-Better-Angels-by-Charles-McCarry.pdf
    • http://muicuiu.dumb1.com/3a03a05a09a09a00/Lucky-Bastard-A-Novel-by-Charles-McCarry.pdf
    • http://muicuiu.dumb1.com/1a03a00a09a00/Bud-Not-Buddy-by-Christopher-Paul-Curtis.pdf
    • http://muicuiu.dumb1.com/5a05a00a01a00a00/Charles-I-A-Life-of-Religion-War-and-Treason-by-Christopher-Hibbert.pdf
    • http://muicuiu.dumb1.com/3a05a01a00a03a06/Valley-of-the-Templars-Templar-7-by-Paul-Christopher.pdf
    • http://muicuiu.dumb1.com/4a05a02a08a09a08/Elijah-of-Buxton-by-Christopher-Paul-Curtis.pdf
    • http://muicuiu.dumb1.com/2a08a07a01a02a06/Bucking-the-Sarge-by-Christopher-Paul-Curtis.pdf
    • http://muicuiu.dumb1.com/1a01a08a05a04a07a04/Secret-of-the-Templars-Templar-9-by-Paul-Christopher.pdf
    • http://muicuiu.dumb1.com/4a06a01a04a07a03/Michelangelo-s-Notebook-Finn-Ryan-1-by-Paul-Christopher.pdf
    • http://muicuiu.dumb1.com/3a09a00a02a01a07/The-Lucifer-Gospel-Finn-Ryan-2-by-Paul-Christopher.pdf
    • http://muicuiu.dumb1.com/9a05a02a02a09a03/Die-Watsons-fahren-nach-Birmingham-1963-by-Christopher-Paul-Curtis.pdf
    • http://muicuiu.dumb1.com/5a08a09a06a02/Little-Paul-From-the-Dombey-and-Son-of-Charles-Dickens-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/4a03a00a06a02a06/All-Our-Pretty-Songs-by-Sarah-McCarry.pdf
    • http://muicuiu.dumb1.com/1a00a07a02a02a09a01/Kathy-by-Charles-Paul-Conn.pdf
    • http://muicuiu.dumb1.com/7a03a05a03a07a08/Charles-Le-Chauve-by-Paul-Zumthor.pdf
    • http://muicuiu.dumb1.com/1a00a00a06a03a08a09/Ein-Lied-so-s-und-dunkel-Metamorphoses-1-by-Sarah-McCarry.pdf
    • http://muicuiu.dumb1.com/

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