Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3ec1927fb4e1aa…

MALICIOUS

PDF

45.3 KB Created: 2021-09-04 15:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: acc290051cf44266f28e015c1e2f845e SHA-1: edd255d0387b2c774a04a093fe970e279c3f0d0d SHA-256: fb3ec1927fb4e1aa564cc3c88830d28caa6ca06948ff19893bde8db4194d080c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious, likely a phishing or trojan delivery mechanism. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to create a link farm for SEO poisoning or to host malicious files. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6732

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://oniceh.ru/uplcv?utm_term=signs+and+symptoms+of+depression+pdf PDF link annotation
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4212ec7772---xewuvesirijug.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8e02c1d55979c2620535bfb18ca88a8d/72106963602.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608313f47800c---75728820142.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/sejeto.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1610963c0ed9de---ruxawugafexolegonepojogid.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a986c84e6dd---bapomekimodefabovevaj.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/21893673490.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63af384412---26957655422.pdfIn PDF document text
    • https://didaktika.drmix.cz/uploads/files/gipimobamofesujatiwezopa.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/7cadb0644ad7d2f3f8a32ab8d4c36c82/sipetujisev.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e14c766712778ac0c8f72f36c5c62186/81929289267.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/vuwuvigedusaparuna.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/lb4lsuc33teekbrbc76s23tak8/31323326390.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/zanakaw.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9ef99b00f---74180120132.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ebb4c2129b3c9a77f28a9a05e5634460/18106090606.pdfIn PDF document text
    • http://vo23.ru/upload/file/wofakezodasakuvuzosa.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/8ecf8d94bf3953b3aa75ed4d1e3efe9e/dozibati.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/89405652689.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/bcd4e618b8c6b9278cfba73a456a5176/febulaketo.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/vomozaxagagejiweboguji.pdfIn PDF document text
    • http://bearcatbb.com/CKEdit/upload/files/80161319377.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/lapolixilivodes.pdfIn PDF document text

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