Malicious PDF — malware analysis report

Static analysis result for SHA-256 be485583e96dd71f…

MALICIOUS

PDF

45.6 KB Created: 2021-09-16 15:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 48045ae5b39679eed5ca6e5c4a421386 SHA-1: 391c512d4c63c7cfdcfabf1655ba5a1082593c79 SHA-256: be485583e96dd71faedebd2b6bf92c6b252295e035523d584cd7bd88cd992d08
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which are associated with compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. The file's purpose appears to be to act as a lure, directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5469

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://smidgel.ru/uplcv?utm_term=my+talking+tom+3+apk PDF link annotation
    • https://triyoga-tv.ru/userfiles/file/46014241902.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/xoveferizasewupote.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/nodusutelubumorafaku.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/8661816472.pdfIn PDF document text
    • https://netlandschool.cl/files/70417074774.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161374dde8738d---jutepugekirabopa.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/7294249341.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/miwejole.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/sejuzaxizubotokidigebepum.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/kesopamib.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/90334118509.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/a2846abbafc34098e9ec37992d4c6593/fugajofilojirik.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/89115830427.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/61156757888.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/devoligabopav.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/161388b9b05158---kaxoxavirawipu.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614042a104306---bofamanadowujabugadidab.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/6414186229.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/19898654341.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5d462a08e---65021262972.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/83100376277.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c10e2ce68---30999355094.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/nulajufe.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161335db19e594---bimukimibut.pdfIn PDF document text

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