Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9dfedfca1f6d736…

MALICIOUS

PDF

48.0 KB Created: 2021-09-19 04:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 890e4ffb02d292f71d494fd244711f4c SHA-1: be3c0dbf8b054ed42e5f3bda90c189c91590733e SHA-256: f9dfedfca1f6d73688de09fd2347e006f2f442b8c04df16a60282bd68e08d7ad
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to link farms and disposable hosting, indicating a redirection scheme. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to lead users to malicious content, likely through a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

Heuristics 3

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://hoatuoi360.vn/uploads/files/seger.pdf In PDF document text
    • http://homearcky.nl/userfiles/file/44305342302.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/xalaju.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/sirixibodewavezez.pdfIn PDF document text
    • http://surausa.com/uploads/files/52673382829.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e81babb69---55895116425.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/48509243332.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/xufoxifiduli.pdfIn PDF document text
    • https://marosme.ro/hirek/file/rewurebumubogipopazufi.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/naburopisutubazafamuki.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/jigamubokegebew.pdfIn PDF document text
    • https://cmf8.ir/data/file/11011278133.pdfIn PDF document text
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/xojupilo.pdfIn PDF document text
    • http://surausa.com/uploads/files/49482183718.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/21757150355.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/zuzol.pdfIn PDF document text
    • https://aurorabersinar2.com/contents/files/41005799028.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/vetawogabofazova.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/63276293440.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/78844757682.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/18460272662.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3aad37516---62168082569.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=symbols+aesthetic+copy+and+pastePDF link annotation

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