Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e87a56d01bd0352…

MALICIOUS

PDF

56.5 KB Created: 2021-07-10 08:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fbfe08845f4ae0cb32513dd7eebfef87 SHA-1: 22ce3d8cc11b6c95915dca54ef3a1329b66c0375 SHA-256: 6e87a56d01bd035223e3d198f22cbd19b9414f8b0b7634e26aa3e1ce8c8d8e81
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7284

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 http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a8ec9114f---fanotosorapuzajevurunavof.pdf In PDF document text
    • http://zavalinka.by/var/upload/file/31939928568.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/9c56e7161ecf623fc76674ded995f45f/94045378243.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/93c65ae8ae096cfa23bc4905779cfa14/46727648528.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93eda8715---1735795866.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/23416020375.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/tewage.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761708e6679---43774530607.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/rikudise.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/45764406218.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/aca4ec696eab4dc84fde0f09f27799cc/xelugaw.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/ruribuxifotup.pdfIn PDF document text
    • http://yanartextil.com/firma/files/kikobizujo.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/tagijapaludenagodasomere.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/sisiravaxudepaxub.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608543459fe4f---98539514070.pdfIn PDF document text
    • http://93564497.com/userfiles/6466334558.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/50582669749.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/3919184037.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/923cca0e74134ef004ba318c29c4e38c/julibudoxifiziken.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/zusufeke.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c940c4f6a9---sexorifogiwewutupozajuzak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=3+letter+words+with+v+and+uPDF link annotation

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