Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6bd5fadd077d56c…

MALICIOUS

PDF

63.8 KB Created: 2021-09-12 12:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f28fb9d4d2343c3484b49ffc6d8a80e7 SHA-1: 779c4f8d8b886190145d5c69ef61adf638c6173e SHA-256: c6bd5fadd077d56c6202283e0a0a4326bb411daca793c488b10149ce82f512a1
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132455e1d849---xezidenabebunedogex.pdf In PDF document text
    • https://tatsolarlight.com/uploads/files/1588507559.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/66999982687.pdfIn PDF document text
    • http://stefani.cz/fck/file/74603640013.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132f7c4d12ba---wazatewomoxavawifabobu.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/xoritorali.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0jctq3pbs4modvoai8lpgtrv07/dubagifoket.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613407875dc6a---84618174258.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/v0i269e8adb48e7lt4i595abom/xugutikogejibutuso.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/jivilipupumamajinib.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/rezije.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/77238894207.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/37153633414.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/kupatufuxodemaxuxelujepoj.pdfIn PDF document text
    • http://slovoveri.org/userfiles/62121714005.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/16743674072.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/55892735.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/bozoburifojorasipo.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/bamumafovurimofikuvop.pdfIn PDF document text
    • https://birotex.rs/images/files/84345630999.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/gisuf.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/55366317946.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ar54oojnlbs9cmv2f6qkjkofs7/vivakamezasinup.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81164886089.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/ruzozu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=televizo+mod+apkPDF link annotation

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