Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf0b2fc26c74cb3…

MALICIOUS

PDF

64.0 KB Created: 2021-07-01 16:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7b6a76aedd4d82d29922b39532b069a5 SHA-1: 359ee500fab5a01b3bfcc0c84f9c8fef7de8da6e SHA-256: ecf0b2fc26c74cb3c27bac30a3ec1b22a7b4e7b5d79059faf37db3a24465c77f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to deliver a secondary payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5714

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 https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608099c968ded---69364718506.pdf In PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607549cf8553e---zonevuripefomokase.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/19086394943.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/d8e5ebfd70f0fda0f2044f9709a649ec/3722112849.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/26067155728.pdfIn PDF document text
    • https://datawire.gr/files/files/beleruzusojopu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/6cn01gm2436ilmd1hitpes2s5g/98050215565.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a65b969ddc0---56785157562.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c098979d56---90544140474.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/o1ggml1krqj91bf3f1mbh8splh/91059055588.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/19c9c2020966b2babe70cfa14f2d5524/35275733976.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/36738596836.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608180477a4f8---nimiwovikigevokegadib.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7d5aa3cf1---60231458430.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160999322dc5d0---walelozuxatavabawefefodaz.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/b83711c532344b2029f4df4a817e0b5f/xavad.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/69853462912.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/44251971233.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/74384868371.pdfIn PDF document text
    • http://aimic.com/userfiles/file/tanovakefikidufidubuvu.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202106290401204327.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/62009206206.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb06a2068---78854999611.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddd9d147bd---72815471774.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098659c9ce6f---21408397071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=acquisition+meaning+in+malayalamPDF link annotation

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