Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e867bafe8b8abf5…

MALICIOUS

PDF

15.1 KB Created: 2019-05-05 16:06:46 +01:00 Authoring application: mPDF 5.7
MD5: c7cfa13526d61afa3a9457c695def6c6 SHA-1: bd6475c0256b924ed041f044fc84475ef3f7c680 SHA-256: 3e867bafe8b8abf5415804a93ee66b1802bfd39d79bb2d37923f0dc1dd28d47b
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which suggests a link farm or distribution mechanism. While the extracted URLs themselves are currently marked as benign, the sheer volume and the ML classifier's high confidence indicate a malicious intent, likely to redirect users to malicious sites or to manipulate search results. No scripts were extracted from this sample.

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/3a02a00a06a04a00/The-Great-O-Neill-A-Biography-of-Hugh-O-Neill-Earl-of-Tyrone-1550-1616-by-Se-n-Faol-in.pdf
    • http://muicuiu.dumb1.com/1a05a08a01a03a06/Man-of-the-House-The-Life-and-Political-Memoirs-of-Speaker-Tip-O-Neill-by-Tip-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/1a00a02a08a08a08a03/Effortless-Success-How-to-Get-What-You-Want-and-Have-a-Great-Time-Doing-It-by-Michael-Neill.pdf
    • http://muicuiu.dumb1.com/3a03a01a05a01a02/Asking-For-It-by-Louise-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/9a01a00a07a07/Just-One-Look-by-Jude-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/2a01a05a05a02a03/Only-Ever-Yours-by-Louise-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/1a00a02a08a08a02a00/The-New-Summerhill-by-A-S-Neill.pdf
    • http://muicuiu.dumb1.com/1a06a03a03/Asking-For-It-by-Louise-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/3a05a06a04a08/The-Dog-by-Joseph-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/2a01a05a01a02a01/Netherland-by-Joseph-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/2a01a00a04a02a06/Netherland-by-Joseph-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/3a03a03a08a00a04/Netherland-by-Joseph-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/1a05a09a02a04a08/Hughie-by-Eugene-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/3a07a06a00a06a05/The-Wonder-City-of-Oz-by-John-R-Neill.pdf
    • http://muicuiu.dumb1.com/1a01a00a09a03a03/So-Far-From-Skye-by-Judith-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/2a03a03a07a03/Beyond-the-Horizon-by-Eugene-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/1a00a02a08a08a08a02/Talking-of-Summerhill-by-A-S-Neill.pdf
    • http://muicuiu.dumb1.com/3a08a08a02a03a08/Legally-Wed-by-Ciara-O-39-Neill.pdf
    • http://muicuiu.dumb1.com/1a00a02a08a07a03a08/Freedom-Not-License-by-A-S-Neill.pdf
    • http://muicuiu.dumb1.com/1a00a02a08a08a02a06/The-Selah-Branch-by-Ted-Neill.pdf
    • http://muicuiu.dumb1.com/2a01a05a01a02a01/Netherland-by-Joseph-O-39-Nei

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