Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48c91c49f9f023c…

MALICIOUS

PDF

48.0 KB Created: 2021-09-16 16:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 574a52b25734a29c80f2216dc841f365 SHA-1: 89b17bdcde23deedc3278d5a4720de516bd3a4cf SHA-256: d48c91c49f9f023c97f6ff5c7cd8443369f6bbb5dc3658b41d70df2c6c4e4921
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress uploads or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=how+to+open+qr+code+android PDF link annotation
    • http://ketphatthinh.vn/upload/files/ruwopikanika.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614236336cdfe---88599952923.pdfIn PDF document text
    • http://africareview.in/userfiles/file/xapadegalusepekejuwo.pdfIn PDF document text
    • https://kingcom.edesign.fr/gr33/web/uploads/assets/file/dejewiganijipuvur.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/jirezigek.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/zezekaketaregepajerid.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-10/20210910193750526731.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/58807237973.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/goxejutegerawiveb.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/sudabigodozilatowil.pdfIn PDF document text
    • http://mlead.net/images/e/file/zajitux.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/72805792170.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303f080d336---mixelezuginizuvovetopim.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b664dd8251---ralijovujurugodajapobedag.pdfIn PDF document text
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/wamirarumugaz.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613d981ce368f---42475963783.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613454cb2f9a8---86397143780.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/fulefibalatetibisek.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/18625834586.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/vugiv.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/70936161994.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/xuvadage.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/jadofajupezedejebujemibi.pdfIn PDF document text

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