Malicious PDF — malware analysis report

Static analysis result for SHA-256 197e7d697c3bbfc8…

MALICIOUS

PDF

67.9 KB Created: 2021-06-24 13:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8f296002ed5babed19d9d86fab6ade1d SHA-1: 50c3082d6e784d6518c9960e2f7d9457f6da73cf SHA-256: 197e7d697c3bbfc8b69d6610167eb79325f1697ef657c0e89edf59be2434b633
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, but no clear user-facing text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6119

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://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2c3f6f486---97516204526.pdf In PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c63ba84b0---mirabefenezezanirisozo.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b46080005cd---86313591065.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/segexatibojupuzezuzaturi.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca138125541---larasovesatizige.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/17d91ff4df9faefe77399056b0202a1c/18341615472.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/83128017709.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160783d5364daa---96038539140.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14f4518aa2---vesiwa.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/oba9cn23h33essoh3egrsjeqk0/koninezunaguziduwal.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ic3m92i50fadj810cjjmastru6/piwiv.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/caib6t90o2o5hajcvqamk3tjqi/zumexonomakitezimexajo.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090dd5347cfd---32241668275.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/48328044119.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/92381414102.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/kofumuwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=energy+balance+of+distillation+columnPDF link annotation

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