Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b0f850b6985d8b…

MALICIOUS

PDF

62.5 KB Created: 2021-09-03 10:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 18b210a91d3d62bea87f20fecbf75e5f SHA-1: c753638b4519d15506fd705e561bf812800f4101 SHA-256: 19b0f850b6985d8b34967d47836bc198fa8b50c20c1643ad9e97e58eba347f80
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with one heuristic specifically identifying a 'link farm' pointing to compromised WordPress upload storage. ClamAV detection and ML classification further indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns suggest the PDF is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5029

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 https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/f1ts0u20eh9ebrfp75anm36fna/virekobapifenejerag.pdf In PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/uttui9ncke1nbmaevirkt0736e/50700335609.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/65385967819.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/40705343274.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16126f675e4bfd---vojoxe.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/79960604322.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071661c2b3a5---60553470097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=alhagi+pseudalhagi+pdfPDF link annotation

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