Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1bfb3e7c6ddbfc…

MALICIOUS

PDF

52.0 KB Created: 2021-08-17 21:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 90b3b37b75a4c916946e6824b6fb0705 SHA-1: f1ca79d7b6cf53d299c05b1833b32b3a84936396 SHA-256: ed1bfb3e7c6ddbfc1122b87a5fcce77fb2897e63f8a75547947d7d1ab1f646fe
154 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised WordPress sites, designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs suggest an attempt to lure victims to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7671

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://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5cf56d50d4e5ec45b42c750b47912e63/wodolis.pdf In PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa51fb940d5---xujim.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/kuboxaxuzarixonavo.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/1889a25caacf20bf5aec6fbcce434ef3/27174259757.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/zopuxalaju.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d92978206e1---fopitogo.pdfIn PDF document text
    • http://secretinvitation.net/images/files/88897942602.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd86ca3a402---nidedenexu.pdfIn PDF document text
    • https://equinox-e.com/upload/files/gurotilo.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/86814766987.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/84859727721.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/ccd351e5b8f34c32e8cc5d97d8a336b3/zasokasuxujap.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/03a21abf8811a9acaf2bf8f30a86d767/zojukovawawinawuponefobav.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/97794024288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+qualify+for+aarp+membershipPDF link annotation

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