Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1728a1ba246b316…

MALICIOUS

PDF

13.5 KB Created: 2019-05-02 01:25:49 +01:00 Authoring application: mPDF 5.7
MD5: 736dc8745ee9e7e01a77ef74a2dd6bfe SHA-1: 194ef96f716ee1766c64d6944e52c183b41a12d3 SHA-256: e1728a1ba246b31667c014e0619295cbb0b5c7e4860f32a5fb763082fcc57b20
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. While the specific intent of the links is not fully clear due to benign reputation labels on some, the sheer volume and the critical heuristic firing indicate a malicious purpose, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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://zacdsa.linkpc.net/5c52c54c55c52c53/Leonardo-s-Chair-by-John-DeSimone.pdf
    • http://zacdsa.linkpc.net/1c54c51c55c50c59/Leonardo-s-Shadow-Or-My-Astonishing-Life-as-Leonardo-Da-Vinci-s-Servant-by-Christopher-Peter-Grey.pdf
    • http://zacdsa.linkpc.net/1c51c59c51c55c50c55/Leonardo-Drawings-60-Illustrations-by-Leonardo-da-Vinci.pdf
    • http://zacdsa.linkpc.net/5c52c54c54c51c54/The-Second-Chair-Dismas-Hardy-10-by-John-Lescroart.pdf
    • http://zacdsa.linkpc.net/1c50c54c52c56c54c55/Der-Maler-des-Verborgenen-Roman-ber-Leonardo-da-Vinci-by-John-Vermeulen.pdf
    • http://zacdsa.linkpc.net/4c55c52c52c57/Leonardo-s-Notebooks-by-Leonardo-da-Vinci.pdf
    • http://zacdsa.linkpc.net/2c59c59c51c53c57/Chemistry-by-Lewis-DeSimone.pdf
    • http://zacdsa.linkpc.net/5c52c54c54c51c55/The-Chair-The-Chair-1-by-R-R-Sechi.pdf
    • http://zacdsa.linkpc.net/1c52c55c55c57c52/Old-Country-by-Leonardo-Donofrio.pdf
    • http://zacdsa.linkpc.net/1c51c56c52c53c50c54/Parmenides-by-Leonardo-Tar-n.pdf
    • http://zacdsa.linkpc.net/5c57c54c54c56/Candido-by-Leonardo-Sciascia.pdf
    • http://zacdsa.linkpc.net/1c51c50c59c54c53c55/Fundamentalismus-Und-Terrorismus-by-Leonardo-Boff.pdf
    • http://zacdsa.linkpc.net/4c51c52c55c51c59/Leonardo-and-the-Flying-Boy-by-Laurence-Anholt.pdf
    • http://zacdsa.linkpc.net/1c51c57c59c57c59c51/Leonardo-La-Gioconda-by-Pietro-C-Marani.pdf
    • http://zacdsa.linkpc.net/6c55c57c54/Leonardo-da-Vinci-by-Walter-Isaacson.pdf
    • http://zacdsa.linkpc.net/3c52c58c50c57c53/Sicilian-Uncles-by-Leonardo-Sciascia.pdf
    • http://zacdsa.linkpc.net/1c51c56c56c56c56/Leonardo-s-Swans-by-Karen-Essex.pdf
    • http://zacdsa.linkpc.net/1c51c51c56c58c56c59/Projeto-Tiamat-by-Leonardo-Gon-alves.pdf
    • http://zacdsa.linkpc.net/7c50c57c51c56c58/Le-Terme-Di-Caracalla-by-Leonardo-Lombardi.pdf
    • http://zacdsa.linkpc.net/1c53c56c57c59/Leonardo-Da-Vinci-by-Diane-Stanley.pdf

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