Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4902796971988f…

MALICIOUS

PDF

135.1 KB Created: 2021-06-22 13:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7259ba772f1bca1c8b778830e46c233e SHA-1: b9ca7e3041a3d908408efc487b5050097c75e00c SHA-256: cf4902796971988fe56082bb82e392940b83b5ec00095b8578dd8972fbfb9127
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of multiple links on potentially compromised CMS upload directories indicates an attempt to distribute or host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9768

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/gnpr61f8o15nbkr3fqfntslhmq/46300716977.pdf In PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-20/20210520054925932386.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/dcfba664c9fe04a52dead64f6cff2850/80322124797.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/osrfgi77dboi8o3m4cktsi9br0/galemulem.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bab0c4a1fe---defemasapitexodemesafigo.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607635ef11622---jininirav.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5e69b8fc5---3774017967.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/ae2fbc63aab9cc7d22081cb85c561e94/18272232695.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/33535868070.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/4d07a81f697c01cf83b59ad41262b009/68115064153.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607a22943e447---burituvag.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1f919fec5---pamaj.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d710f308a3---mowed.pdfIn PDF document text
    • http://seamacros.com/upload/file/notezagexukutapubin.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e58202f40b---giriwifuwuk.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/0idgc5sp7b7b3bpnffhfafrsi5/zudenerojen.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/79554828649.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/d3d7b1a29960acba67b171b6f19251ed/34001381851.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/dosogadifabubifodaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ps5+debut+datePDF link annotation

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