Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cb9c70d0651d43…

MALICIOUS

PDF

17.8 KB Created: 2019-05-02 02:52:58 +01:00 Authoring application: mPDF 5.7 First seen: 2021-10-11
MD5: 071024899fccbbb8bed99ef7ddf1e3c1 SHA-1: f5133541f544cabe10220e5943955e39cd7c36f2 SHA-256: 79cb9c70d0651d43d5114eff6ebacf6bae14345d9866c035aae5473461e9e7cb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to manipulate search engine results or distribute malware. While no scripts were explicitly extracted, the presence of embedded URLs within the PDF structure indicates potential for malicious redirection. The ML_NYX_PDF_MALICIOUS heuristic further supports the classification of this file as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://loaminoo.linkpc.net/1094092098092098/A-Novel-Bookstore-by-Laurence-Coss-.pdf In PDF document text
    • http://loaminoo.linkpc.net/3099094098095093/The-Lady-in-Medieval-England-1000-1500-by-Peter-R-Coss.pdfIn PDF document text
    • http://loaminoo.linkpc.net/5099093090096092/Mr-Penumbra-s-24-Hour-Bookstore-Mr-Penumbra-s-24-Hour-Bookstore-1-by-Robin-Sloan.pdfIn PDF document text
    • http://loaminoo.linkpc.net/1097093098098098/Mr-Penumbra-s-24-Hour-Bookstore-Mr-Penumbra-s-24-Hour-Bookstore-1-by-Robin-Sloan.pdfIn PDF document text
    • http://loaminoo.linkpc.net/1090095096091090/The-Bookstore-by-Deborah-Meyler.pdfIn PDF document text
    • http://loaminoo.linkpc.net/2098092095095/Adult-Bookstore-by-Karl-Shapiro.pdfIn PDF document text
    • http://loaminoo.linkpc.net/1090095093093091095/The-Classic-Works-of-Laurence-Oliphant-by-Laurence-Oliphant.pdfIn PDF document text
    • http://loaminoo.linkpc.net/2091093096095093/Mr-Penumbra-s-24-Hour-Bookstore-by-Robin-Sloan.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3093092097090095/Bookstore-Lore-by-The-Staff-at-Tro-Harper-Books.pdfIn PDF document text
    • http://loaminoo.linkpc.net/8094092097090091/Overhead-Crane-Taining-Pack-by-ITI-bookstore.pdfIn PDF document text
    • http://loaminoo.linkpc.net/4099095095094095/Staurolite-Enchanted-Bookstore-Legend-4-by-Marsha-A-Moore.pdfIn PDF document text
    • http://loaminoo.linkpc.net/1090095093091096095/Laurence-Oliphant-Memoir-of-the-life-of-Laurence-Oliphant-and-of-Alice-Oliphant-his-wife-by-Mrs-Oliphant.pdfIn PDF document text
    • http://loaminoo.linkpc.net/5093094091099097/M-P-nombre-libraire-ouvert-jour-et-nuit-Mr-Penumbra-s-24-Hour-Bookstore-1-by-Robin-Sloan.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3098091093099091/My-Bookstore-Writers-Celebrate-Their-Favorite-Places-to-Browse-Read-and-Shop-by-Ronald-Rice.pdfIn PDF document text
    • http://loaminoo.linkpc.net/9094090094098/The-Book-Itch-Freedom-Truth-amp-Harlem-s-Greatest-Bookstore-by-Vaunda-Micheaux-Nelson.pdfIn PDF document text
    • http://loaminoo.linkpc.net/6095099097092099/The-Collected-Poetry-of-Paul-Laurence-Dunbar-by-Paul-Laurence-Dunbar.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3098097093099096/Holy-Crap-The-World-is-Ending-How-a-Trip-to-the-Bookstore-Led-to-Sex-with-an-Alien-and-the-Destruction-of-Earth-The-Anunnaki-Chronicles-1-by-Anna-Marie-Abell.pdfIn PDF document text
    • http://loaminoo.linkpc.net/2095099094091095/Ajax-Penumbra-1969-Mr-Penumbra-s-24-Hour-Bookstore-0-5-by-Robin-Sloan.pdfIn PDF document text
    • http://loaminoo.linkpc.net/1090097093092093099/Upstairs-at-the-Strand-Writers-in-Conversation-at-the-Legendary-Bookstore-by-Jessica-Strand.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3093099092096091/Found-at-the-Bookstore-Found-2-by-Christi-Snow.pdfIn PDF document text

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