Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e48dca9bed27fa8…

MALICIOUS

PDF

51.7 KB Created: 2021-09-02 08:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f5c9d7644e5ee72a3a074981867e1d24 SHA-1: 9efa03b93ecf1d272546b978819f517c2d278a6d SHA-256: 8e48dca9bed27fa8e08ccaea1c11ffa60436f17a746f97db148f0ce15c1e21ca
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to domains with unknown reputations, and one heuristic specifically flags it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8512

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
  • 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://sunnysolutions.it/uploads/assets/file/lubojerazi.pdf In PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/13234952089.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611c033c99f7b---vamotunawojetu.pdfIn PDF document text
    • http://hbtsap.com/Upfiles/news/file///34054761436.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/zuturomivevibuduxoke.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6f65fc750daa2750ee8bde8ec25c17a9/sonox.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/47687539339.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/muwomifibopurefusagot.pdfIn PDF document text
    • https://digireg.li/upload/ranolidunulekanatu.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/vudomivelipukuvoluxiger.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=best+family+medicine+doctors+near+mePDF link annotation

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