Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fc238f79debfb2…

MALICIOUS

PDF

70.3 KB Created: 2021-08-01 08:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ca52bf7429d87b74942f234a4f3acbb4 SHA-1: 488a3f4569fca3e01cbf5d01d52f9da6d5ed94ad SHA-256: 38fc238f79debfb29089f2f3f70b969c67071e3678b9f45d6bdaf1c7f29549e1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains multiple embedded URLs, one of which points to a compromised WordPress site hosting a PDF file. This suggests the PDF is part of a phishing campaign or a distribution vector for further malware. No scripts were extracted, limiting the analysis of its direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5715

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 http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c95d77d1dca---wetotilapate.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fd490d1ebd1---vubeninamemipukusimof.pdfIn PDF document text
    • https://codecs.roimages/file/sijidoxuta.pdfIn PDF document text
    • https://gitedu.in/ckfinder/userfiles/files/55225357693.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/j0m61u85gvh5oco4ui618d0ctv/93872444102.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/fapakizobagasow.pdfIn PDF document text
    • http://marymo.ru/uploads/files/zoporurudiz.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/midewodonaxevetitobagur.pdIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=naruto+shippuden+ultimate+ninja+storm+4+gameplay+androidPDF link annotation

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