Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec74cdfb6d0db63…

MALICIOUS

PDF

42.8 KB Created: 2021-09-05 23:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b483a5f24cabf3ef954624c1d6ca581a SHA-1: 1313b4ad8ce948f543b8686a51909434e02c09c9 SHA-256: 2ec74cdfb6d0db637d1bc5b02d599d0e93768804faf8c6abe1defe95361aee01
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier further indicate malicious intent. The file's structure and URL patterns are consistent with a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6944

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://braciszewska-klimek.pl/fck_files/file/86720904486.pdf In PDF document text
    • http://happinessgown.com/upload/users/files/96629430975.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/46007c34e5e09a1264d42495edeba4ab/papetowotomekotukut.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6d946254e---44989942552.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/bebidakoxofalefirariwe.pdfIn PDF document text
    • http://platcometals.com/images/file/xipuzex.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610a6b282e015---4289113938.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608c03c6cdcd6---11568233185.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/rosimodabemojufuzolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=biblia+de+estudio+reina+valera+1960+gratis+pdfPDF link annotation

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