Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a7a2900dcb33e1…

MALICIOUS

PDF

60.8 KB Created: 2021-06-12 14:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3f2319d11b8e92c812681a590f3b9bf0 SHA-1: c86c2c41a9d0642ccea7204c40a45696bb10d65d SHA-256: 87a7a2900dcb33e1c2b6b4a65104cfcfc890a30d5c4e1e206d5045ddc448f467
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6759

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=download+drama+thailand+bad+genius+the+series PDF link annotation
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608645cc4789c---wudipowolojesoviriwavado.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/22012361057.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/7255632381.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868016ce732---42873129884.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609747e07b149---68366566431.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/bizugipuribinugewowozen.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/fotemuzuguzagalimev.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/tawuder.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/cff951fcb7de70c9bf0b8b6838d981bd/86394522292.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/a01cbd4aa4edf309e16108fbe2fd80a3/mepajanewapo.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/ginezikodunibudogower.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49390e125---roxukagovitubojiredowuri.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c894948fa6---41616204700.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/ac362c34da579e823a0cd79a796f8267/25078584598.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1bfebe667---judot.pdfIn PDF document text

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