Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd25bd4d033425d…

MALICIOUS

PDF

158.3 KB Created: 2021-08-04 19:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e507e988298b3d10bdabcb006dd00228 SHA-1: 409e98eabe55a77fa44c7f3fa1850a02c47cfd37 SHA-256: 7fd25bd4d033425dfd8af9fb32182254e589f02e53f4959cdfe8b21cbe1baf0b
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and a link farm on disposable hosting further supports a malicious intent, likely to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9004

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 https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0587546532ea79629f4a669962717b02/bimeforutaruzewupetowika.pdf In PDF document text
    • http://transfertrolley.cn/d/files/zotonisereko.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073a06003a2b---30820671593.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/xigevixopowepiziruku.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/0q69g4lkf1pd1pq3e3dld73bd5/45607124339.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/48707401331.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/5837906675.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/21785419203.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160968a418c254---52118769919.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/19381834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=where+does+long+bone+growth+occurPDF link annotation

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