Malicious PDF — malware analysis report

Static analysis result for SHA-256 939bfdd9840245b9…

MALICIOUS

PDF

80.0 KB Created: 2021-07-21 17:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 82c8251876b7c05ad2f52293b1d6d1d8 SHA-1: b0642fc8229b8d3ca495efcacdfefa9bf2de899a SHA-256: 939bfdd9840245b9747c16d7431b0cfb22bca79d194c827db9568b1b1b63e3c2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also flagged this PDF as malicious. The presence of a link farm indicates a likely lure to a secondary malicious download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7725

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dpt-mh.com/uploads/news/files/dovas.pdf In PDF document text
    • http://shuswapladystriders.ca/userfiles/file/38312092848.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d47ea1bfb67---50171992316.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098cc093a8b1---nogatewesaporewofunipaf.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b015c9fa67---bileguburopovopew.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/89153439781.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/bulonutafafisobuxiza.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a249e0040a4---73230370263.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/zadosirusewukogegeli.pdfIn PDF document text
    • http://novichiha.ru/pic/file/96081611460.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160881938ea680---94515119410.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/fogomu.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/p5uempi08tak59ajo8ke95lqkf/mapovukanolu.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/41212402905.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/21618268678.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/zanemuwewafogom.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c48f2d666---gijawumufefodalixovise.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/lokasul.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/b6539bb7bb97ad38840e1046410299fb/17323142293.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/wupuvobaxik.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/55056365958.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/vumuned.pdfIn PDF document text
    • http://abpaluso.com/upload/file/xajob.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/eju84n0j022s5f75erp90oqbqm/30037464038.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+crucible+act+1+study+questions+pdfPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.