Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4db2073f53b78b6…

MALICIOUS

PDF

47.5 KB Created: 2021-06-27 15:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b7a26c95b6cf4675e1983e4de6d399b SHA-1: 16f2513274149936d5824d077c1d0d07ef1d1898 SHA-256: d4db2073f53b78b6a5426a661cfc4d8efab752e72b77a35fc11276010dc826f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8030

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://crewmak.ru/uplcv?utm_term=something+wicked+streaming PDF link annotation
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/87562010e2ecad3b60a76f2db644c814/64926941435.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/23769347602.pdfIn PDF document text
    • https://onlinendttraining.net/files/7152544429.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/bb5agk2mq83vgk0eml9s11o4k4/dinigatilunufaverokedapuv.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc64cfe57d1---17504184998.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/0a51ld9tmdonb0gnk8f9ebno6t/popij.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609063bf4578b---vefozu.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a175b267b---26506595151.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/45aef94fa15748c2b9b62a748453749b/wubewinofabaveledola.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/67114712226.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/31557007944.pdfIn PDF document text
    • http://recrute.fr/files/files/76592283028.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0123990e66---79392270554.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/mebuj.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffdeb2dd8f---vexoz.pdfIn PDF document text
    • http://ciskmv.com/css/file/vutofa.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/3c7d89af4d14f3b4e6d9b0991c4d1e52/tafuforaba.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b16777ad066---mejuwisimewi.pdfIn PDF document text
    • https://go2germany.ru/files/file/20715645616.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/b51aa15725942d6cda61adc4beec61e2/10550398354.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/46385681832.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/1a68a636fe7f8180deaf429e0b17ca4e/dadosimezomadejamisuwa.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/p75g79kn4knmcj1btcpnihmv2k/1675592545.pdfIn PDF document text

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