Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4ca94068c9c38c…

MALICIOUS

PDF

63.7 KB Created: 2021-08-14 10:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4cf0c0d2990fbcc39fd5bad8c1b665a5 SHA-1: d7f240c259b7a364fa2f864408674723ae65768a SHA-256: ff4ca94068c9c38cf6e79dd009a660e09c6574678cea9db63425e9a4a7f1f79e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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://afghansolar.com/userfiles/file/zodugudujo.pdf In PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/jodujasasi.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/fidiwoxasazirobaxodogifu.pdfIn PDF document text
    • http://axwelindia.com/uploads/80578041072.pdfIn PDF document text
    • http://gibisch.info/files/files/91312650973.pdfIn PDF document text
    • http://canvangdientu.com/images/file/38238882867.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099d50e47924---dulunasofalusipini.pdfIn PDF document text
    • http://waypl.pl/upload/File/33532320675.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/cb01b2e4fc46284925cf649085f03d9f/7722882949.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a7ac4d40a---vugiv.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16110420bb9b34---35233803033.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/e6b1467beb6ebdbfcefd083af23a885d/sunagi.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/67808216915.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/19210823991.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/cea27cdc6cdd1bd52600776b5be805d7/4949373424.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16072c61d3988e---14745909025.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ce4d82d0a8031b46e083724001938982/42398287543.pdfIn PDF document text
    • http://airmon.hu/images/files/weruzaf.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608699bc1a679---55858767004.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/pajidalu.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/3db7a1555d82377df49c6cc32ab2b8aa/15520581027.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/medidumovuzasovav.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/xawax.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/l4g5hqg63ljsc44pqj41ngl6r4/pujemo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=what+aku+aku+sayPDF link annotation

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