Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54590f6b8cf8bbf…

MALICIOUS

PDF

52.0 KB Created: 2021-06-21 08:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8c502d8243b8221f05b41b2a851c3b2c SHA-1: 552b145a616c40f184ea20af24bc822c967965cb SHA-256: c54590f6b8cf8bbf31117a3e334dc3cfe1dba559a54c7062bc787b40f32cfdb5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as a phishing trojan. The presence of embedded URLs and the nature of the heuristics suggest this file is part of a phishing campaign, likely using a spearphishing attachment as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7179

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 http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb89a5138---kalumixatalisow.pdf In PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/f834fa365f5b04db3efd4be8c59042a4/rutewiluta.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/warozatimubivifazepebo.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072187cea95b---zibozoxizabito.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b9201d80---mukojozupogowapakomekutal.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/k4af5tl3krkmhvmtjih8h439bd/fazijopusagepa.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/f48ef629e787b9d909089a2c01f50bcf/kugesemupes.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f77aedf40---5699943410.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dbf2aed99---4569603679.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/ce1287d390cc422094255794622171d6/61933052972.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ceee88d799e---waxozogolavaj.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/95578515029.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/99277893700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pandesal+business+plan+pdfPDF link annotation

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