Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a01cb70cce12ea…

MALICIOUS

PDF

14.4 KB Created: 2019-05-06 18:43:54 +01:00 Authoring application: mPDF 5.7
MD5: 9b0dbed8cc4dfbff3d364d398d162717 SHA-1: 05bee52b2799850dfe579c7d97453f0fac23ac73 SHA-256: e8a01cb70cce12eaf1ce9009b26c8f3baa468fe199a9124150b5fdb517ebcd20
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While the specific URLs extracted are currently marked as benign, the sheer volume and structure suggest a malicious intent, possibly for SEO poisoning or to distribute further malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious verdict. No scripts were extracted from this sample, limiting the ability to determine the exact payload or delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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/8c56c58c53c56c59/Kriegerin-im-Schatten-Throne-of-Glass-2-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/6c59c58c50c59/Kriegerin-im-Schatten-Throne-of-Glass-2-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/4c59c53c54c54c52/Throne-of-Glass-Throne-of-Glass-1-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/1c54c56c57c50c50/Throne-of-Glass-Throne-of-Glass-1-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/3c52c51c50c52c54/Throne-of-Glass-Throne-of-Glass-1-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/3c54c51c57c51/Throne-of-Glass-Throne-of-Glass-1-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/1c51c50c55c52c56/Throne-of-Glass-Throne-of-Glass-1-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/7c51c58c54c55/Throne-of-Glass-Throne-of-Glass-1-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/1c51c59c58c56c50c51/Midnatskronen-Throne-of-Glass-2-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/5c54c54c58c55c54/Midnattskronan-Throne-of-Glass-2-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/1c50c51c53c56c59c51/Die-Sturmbezwingerin-Throne-of-Glass-5-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/9c52c59c54c53c59/Celaenas-Geschichte-Throne-of-Glass-0-5-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/9c52c59c54c53c54/Celaenas-Geschichte-1-Throne-of-Glass-0-1-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/3c58c54c56c51/Heir-of-Fire-Throne-of-Glass-3-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/4c53c50c51c57c58/The-Assassin-and-the-Desert-Throne-of-Glass-0-3-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/3c58c58c57c55/Crown-of-Midnight-Throne-of-Glass-2-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/3c53c54c51c57c59/Tower-of-Dawn-Throne-of-Glass-6-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/1c54c58c57c57c50/---Throne-of-Glass-1-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/6c51c50c52c56/Empire-of-Storms-Throne-of-Glass-5-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/9c51c54c58c52c53/Erbin-des-Feuers-Throne-of-Glass-3-by-Sarah-J-Maas.pdf
    • http://zacdsa.linkpc.net/9c52c59c54c53c59/Celaenas-Geschichte-Throne-of-Glass-0-5-by-

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