Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efee50c9cc63ed8…

MALICIOUS

PDF

362.7 KB Created: 2021-07-28 03:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 847b1b3cad937894f31e1f465f019535 SHA-1: df1349d39f121084dec0cf87fff43295edaad411 SHA-256: 9efee50c9cc63ed8629e79bbd0108c7e388c0f9a658af341648ba29a072f7578
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7145

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 http://unionzglobal.com/ckupload/files/28035042568.pdf In PDF document text
    • http://integrotech.com/zdjecia/file/nalalanegebav.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/dilubixof.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096927880c6f---11122882400.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/82642841745.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160dbfafb8b052---23259790712.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0632ab911---44103314825.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099d08418723---94377672228.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f38cc02946f---sakegevatugegep.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb12d8ccc4---82206953148.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f5feab7d6---zufekalatatobiwasis.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0612/255e137031526d37def0fb30fecdee2f.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69658ebb67---xidawimifojikix.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/c7ec95c1ce8692e4ea21bd16f817ddc1/37794508267.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/wigitilafunado.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/48729075776.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/wasoweborewubeg.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/33460000567.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/9smk7566uq42rs4r48pa2hfn2e/kevuna.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210624195739718751809g09omv8ne.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/3d413583671b55c3e44a24f05e4c6b8c/ruvodudinubamapavogevatek.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f587ad0b0e87d8a0daf57a3293b1269d/96161364989.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b186f2584---2730564640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=resumen+del+libro+historia+de+la+fealdadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54FBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000567d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567D0 16868 bytes
SHA-256: d5799b3c1962948c165b1efd799ddaebed05b4c85b6ff07ff9da12e1128a0487

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