Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf243e04a6a966f…

MALICIOUS

PDF

562.5 KB Created: 2021-07-04 06:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 74f545ae9b806480c6cee1def3b87c6d SHA-1: 7f4451fea8d914b8e8c33105473533904feaaceb SHA-256: 2cf243e04a6a966f1dd437d00153584eac055dc75c43f5e5d9ef00401e756711
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links, many of which point to compromised WordPress sites. The ClamAV detection and the presence of external URIs suggest this PDF is designed to redirect users to malicious content, likely for phishing or to download further malware. No scripts were extracted from this sample, but the heuristic firings strongly indicate a malicious intent related to link farms and compromised web hosting.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3434

Heuristics 4

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=new+use+patent PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7758dacd9d---rapufuboxegef.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/942311d34487fd96ed6d621cb26634e4/37169266747.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/mutoparozelelut.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/2768961268.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/860931b5d64b8c762c0340a035afdfd7/25399306877.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/keziriziterex.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/gitezifofo.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/firebalu.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/014148ef0b7102a306122d440bfe8f9b/jatosonogalufijenu.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/bexone.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b4195fd77a9---pelemi.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777e9a50cfc---47933606093.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/tofisojajerunakubofugenum.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b811d675---mepejokemawo.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/39334870596.pdfIn PDF document text
    • https://tonitomov.com/picture/file/5556075359.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a99e332ea35---jefonaboz.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/vuronaresos.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160846e6a95d26---tufakolipopowot.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/0a7mp2mbrl8spsi6pk47p5nc1b/8017025289.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/seziwerakezuwegijezavodof.pdfIn PDF document text
    • https://shibbirs.com/media/files/98567101415.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebeb6c8ff---79393948485.pdfIn PDF document text
    • https://areicon.com/images/file/wivewelelimiwe.pdfIn PDF document text

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