Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd9db81a0d872f6…

MALICIOUS

PDF

64.0 KB Created: 2021-06-27 09:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 240db00e08d58bf0c19f19fa8892ea22 SHA-1: 4d3f70bc2a0f74c4e23f8b2ce123393cf33857cc SHA-256: 6dd9db81a0d872f677159e8d35b5c2310a1e10235e6b5448ced48ab612c456ad
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for phishing or malware. The heuristic firings suggest the document is designed to lure users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5245

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://synerhu.ru/uplcv?utm_term=solute+and+solvent+of+dishwashing+liquid PDF link annotation
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/7635af0aa3d62cfba1f3fc926d060bd4/wubofunezago.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f2f0edcc09bb7158d3b6df2e2b98bd58/vojogesogapagowemofe.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a53dc411bc---82352442470.pdfIn PDF document text
    • https://baongochoa.com/upload/file/veweroj.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c04538bedd4---saditeri.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/78439257216.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/posuwogilapawow.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0951be231---tozusubisaxud.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071913e41559---sisitamujiwu.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/85691499660.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/b80f25843fdc5cdd262ad5d48cc0eb85/xovinetefiwixob.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3543318b7---75063267569.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b588769ff11---zimebizetaxukefisa.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/ae12b756963a054222728baab6683513/29179484642.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/tifizokakag.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/xolatazalojewolegamun.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/linipagulupope.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/38467119956.pdfIn PDF document text
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/93075727650.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607978bcef5fa---bobomuvuze.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c76e2b968a---21065466888.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf160591e59d340dc76b676dc91b6b06/57298855814.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd042f388df---10266157686.pdfIn PDF document text

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