Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b2b7d3c226f61a…

MALICIOUS

PDF

44.2 KB Created: 2021-10-09 00:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 8fe4ba6147690f6a76bfaa5bc52e9095 SHA-1: ef5d875bcb58d48e45b92115e1aaa5f934b1bc23 SHA-256: 64b2b7d3c226f61a9eb06b9a38f99081fa0ae04910993b5d38897c7aae80b1da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to external websites, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8070

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 http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/vezitajufewo.pdf In PDF document text
    • http://letnipohar.cz/upload/file/kigapuradizi.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/vujadasuwurawoke.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613101c0315be---vawaredokejir.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/45422173434.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/xojowulegor.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/59881165230.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/01e938571871214e66ca3efefda5596e/94498037401.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/pibegemakiri.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/43501435198.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/kegosajolanafa.pdfIn PDF document text
    • http://parilka.by/var/upload/file/lagewuz.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/pibidujat.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-13/210913103736689812jtzem4frhei2.pdfIn PDF document text
    • https://protum.se/file/32894981152.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150cc4082b29---vogeriw.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1614cafa60c066---32924359751.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/tetowenofegefadonageto.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/mopelinokanubivimugigi.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/72961088873.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/30826427294.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=up+to+par+meaningPDF link annotation

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