Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8e2ab4ff1cae4c…

MALICIOUS

PDF

48.0 KB Created: 2021-07-22 11:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 99908d18d294bb06addbbdcc00e6d554 SHA-1: 896662b5a712174e9e7d4ef83e3ddbe0e00c8502 SHA-256: 6c8e2ab4ff1cae4cc4ce71c515b6d4c1cda8f19d33cdbb8edf8294508c232884
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress upload directories and other potentially disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The presence of external URIs and the nature of the heuristics strongly suggest this PDF is part of a phishing campaign, likely using spearphishing attachments as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6791

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://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a99f92f04---17336544652.pdf In PDF document text
    • https://angelsstaff.com/uploads/file/67157559488.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96e22ca85---zalujut.pdfIn PDF document text
    • http://uci.ir/userfiles/file/sajobifovajuviruwanoxam.pdfIn PDF document text
    • https://btegypt.com/file/dujebajupurigi.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160868822a07c7---vitegi.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/59874954817.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0573ab6af9---baxikasowizamibamisixe.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/rutepolazutitabisor.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ab750debf---13749158272.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607995c93fda1---95436921668.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e6810d58f---kenuvalegetepel.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dbtfshuk3aih8ls8tn8okkvf73/zetobem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=manual+driving+tips+for+beginnersPDF link annotation

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