Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a9bd1324c2c279…

MALICIOUS

PDF

43.2 KB Created: 2021-09-26 03:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 26c5e89663df830c573938e4375cdbb1 SHA-1: e9d6d5dafa75c93dab90d863e1cbbd4dc32017c7 SHA-256: 59a9bd1324c2c279c940d42691bb7e1f0ec854eef43e8bd0cf7307d04a8343cf
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded JavaScript likely redirects the user to a link farm, as suggested by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, which is often used for phishing or distributing further malware. The presence of numerous unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8232

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.hinkler.com.au/application/third_party/ckfinder/userfiles/files/32266702277.pdf In PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/d126b917d99e350a10ac05e507094197/malefaw.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/duredaxoxena.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/bekajisisemavi.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/numuvuvupinet.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/57590451320.pdfIn PDF document text
    • https://ratosatu.com/contents/files/26972538443.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/manusedoweviwunutuxisuv.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/52463186907.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f964035ec5---9002940119.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/34754168843.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/diruwuzirawotululimasisi.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/lerazovofokujotinimo.pdfIn PDF document text
    • https://krafteco.ru/uploads/files/67422062355.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/boneluxutarewogej.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/24772133971.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/beziru.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/repexabizavo.pdfIn PDF document text
    • https://ayurmitra.com/files/file/fipigoxe.pdfIn PDF document text
    • https://msvadba.ru/files/file/7525152336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=heart+diagram+for+labellingPDF link annotation

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