Malicious PDF — malware analysis report

Static analysis result for SHA-256 999097b7dc25ff74…

MALICIOUS

PDF

60.3 KB Created: 2021-06-24 23:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434a099c2fdec5dab01756346c5cc50b SHA-1: cc71ad4855a9dabcd5ad021d6527d3089868044f SHA-256: 999097b7dc25ff749fc647f80567109d91bf76e0e922c5b945abff2d88b35032
154 Risk Score

Malware Insights

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

This PDF file contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document body, though heavily obfuscated, contains metadata related to PDF creation, but no direct user-facing text that would indicate a specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7109

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://catamma.ru/uplcv?utm_term=constitution+of+great+britain+pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608695f2b0785---91421874269.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1d93ed8b---lovunivevogifubibojotafas.pdf
    • http://vogiantinhmach.com/media/ftp/file/jugozetiriwivimemegukaf.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4bff1f562fb96ce2644b78518f823d88/39842227433.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f28cdde4d0---balebiwilufuzafubijafixiz.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/9r4nmkoc3pu8c2rsgs7q075gsu/tilifonozigebeluzowe.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/cd7a05ab8f2127b6b4099b71205ae41b/79784775884.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/7767e79ece3644c453426831727ab4cd/kelubazaxegubolu.pdf
    • http://aggengr.com/uploads/CMS/file/papekuvewepa.pdf
    • http://aranykoronakft.hu/userfiles/file/nixefegudikome.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/0f8befbc1cd1579ae60aa036da606189/lazijupesa.pdf
    • https://pharma-tools.eu/galeria/file/luvikunitusowefimoxiloji.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5dfd1579b---37246834401.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/1aa2070d55e5630f47f5d25d0dc85b77/rutukusekinesa.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/l1r7fhhehskq2ulebs78no8dip/28279488761.pdf
    • http://sugarfree-gelato.com/upload/file/34269936114.pdf

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