Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c386e78328f614…

MALICIOUS

PDF

21.1 KB Created: 2019-04-30 03:39:26 +01:00 Authoring application: mPDF 5.7 First seen: 2021-07-13
MD5: c77f25748b7037509383bd6812c98a38 SHA-1: 6a0d5882a44377dde45432f2c33499739325ae56 SHA-256: e5c386e78328f6147a7fe96805054ed4e7cdf74f661d6a87b899d9beba53fade
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a link farm. While the document body is heavily obfuscated, the presence of numerous external links suggests an attempt to direct users to malicious content or manipulate search engine results. The ML classifier also flagged this PDF as malicious, increasing confidence in its harmful intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/4a03a07a07a00/Listen-Little-Man-by-Wilhelm-Reich.pdf In PDF document text
    • http://muicuiu.dumb1.com/2a05a05a06a05a08/Character-Analysis-by-Wilhelm-Reich.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a05a01a04a06a01/The-Mass-Psychology-of-Fascism-by-Wilhelm-Reich.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a06a07a05a04a01/Wilhelm-Reich-in-Hell-by-Robert-Anton-Wilson.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a04a01a09a08a02/The-First-and-Final-Nightmare-of-Sonia-Reich-by-Howard-Reich.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a04a02a08a03a09/The-Third-Reich-in-Power-The-History-of-the-Third-Reich-2-by-Richard-J-Evans.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a03a02a01a06a07/Wilhelm-Hauffs-Sammtliche-Werke-in-Zwei-Banden-by-Wilhelm-Hauff.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a03a01a08a00a01/Understanding-the-I-Ching-The-Wilhelm-Lectures-on-the-Book-of-Changes-by-Hellmut-Wilhelm.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a01a04a02a00a01/Glaube-an-dich-und-werde-reich-Die-Fortsetzung-des-Bestsellers-Denke-nach-und-werde-reich-by-Napoleon-Hill.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a05a08a01a02a04/Musikhistorisches-Museum-Von-Wilhelm-Heyer-in-Coln-Kleiner-Katalog-Der-Sammlung-Alter-Musikinstumente-Verfast-Von-Georg-Kinsky-Volume-1---Scholar-s-Choice-Edition-by-Wilhelm-Heyer.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a02a00a07a04a06/Sidonia-the-Sorceress-Volume-I-of-II-by-Wilhelm-Meinhold-Fiction-Literary-Fairy-Tales-Folk-Tales-Legends-amp-Mythology-by-Wilhelm-Meinhold.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a05a03a07a05a00/Heinrich-Wilhelm-Brandes-Vorlesungen-ber-Die-Naturlehre-Zur-Belehrung-Derer-Denen-Es-an-Mathematischen-Vorkenntnissen-Fehlt-Teil-3-by-Heinrich-Wilhelm-Brandes.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a01a00a08a08a04/Friedrich-Wilhelm-Murnau---Die-Privaten-Photographien1924-1930-Berlin-Hollywood-Tahiti-by-Friedrich-Wilhelm-Murnau.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a09a03a04a08a06/Wilhelm-Busch---Gesammelte-Werke-by-Wilhelm-Busch.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a04a08a05a08a00/Listen-Just-Once-by-A-R-Von.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a08a01a02a04a04/Listen-for-the-Singing-by-Jean-Little.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a02a06a02a00a00/Listen-to-Me-by-Alessia-Brio.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a07a00a01/Listen-to-Me-by-Hannah-Pittard.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a01a06a06a00a06/How-to-Listen-to-God-by-Charles-F-Stanley.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a05a07a09a06a08/Listen-by-Vladimir-Mayakovsky.pdfIn PDF document text

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