Malicious PDF — malware analysis report

Static analysis result for SHA-256 04137f441b3c1208…

MALICIOUS

PDF

15.9 KB Created: 2019-04-30 04:34:27 +01:00 Authoring application: mPDF 5.7
MD5: f5ea09b66e43e80ee53afec0a082f7ad SHA-1: b65b6e9b17850e99124f37370436df5f05b9a2d8 SHA-256: 04137f441b3c12084579243e61309f265262f9f26e17392ece6efe4e4ad6dcd4
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are to external resources, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the presence of numerous external links suggests an attempt to lead the user to a compromised or malicious website, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/6a00a08a09a01a04/Fiabe-italiane-raccolte-dalla-tradizione-popolare-durante-gli-ultimi-cento-anni-e-trascritte-in-lingua-dai-vari-dialetti-da-Italo-Calvino-2-Voll-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/8a08a01a08a03a03/De-f-bula-Biblioteca-Calvino-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/5a00a05a01a09a05/Our-Ancestors-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/7a00a07a02a01/Under-the-Jaguar-Sun-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/4a04a01a03a02/Mr-Palomar-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/6a00a09a00a02a00/Un-ottimista-in-America-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/8a01a09a06a00a00/The-Nonexistent-Knight-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/3a00a08a04a00a09/Invisible-Cities-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/7a03a01a05a03a09/Marukobarudo-San-No-Shiki-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/6a09a05a02a07/The-Watcher-and-Other-Stories-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/1a03a07a01a07a02/Italian-Folktales-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/3a02a06a02a09/If-on-a-Winter-s-Night-a-Traveler-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/3a01a03a00a08a03/The-Castle-of-Crossed-Destinies-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/1a07a05a03a06a00/Marcovaldo-Or-the-Seasons-in-the-City-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/4a00a09a06a03a04/If-on-a-Winter-s-Night-a-Traveler-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/8a08a05a08a00/If-on-a-winter-s-night-a-traveler-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/8a09a06a03a07a04/Marcovaldo-oder-Die-Jahreszeiten-in-der-Stadt-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/9a05a02a09a06a03/Wenn-ein-Reisender-in-einer-Winternacht-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/1a00a02a09a00a01/Our-Ancestors-The-Cloven-Viscount-The-Baron-in-the-Trees-The-Non-Existent-Knight-by-Italo-Calvino.pdf
    • http://muicuiu.dumb1.com/7a09a08a07a04a01/Alfonso-by-Felix-Calvino.pdf

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