Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c47ec6ffc330435…

MALICIOUS

PDF

49.8 KB Created: 2021-09-17 01:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f34fc7ebe55689517226f63a7aa069a4 SHA-1: 2e730d91eae8d3d80acc27b7c17213574f0addab SHA-256: 2c47ec6ffc3304350451468db34e48e7492c7fc455271462883fe493c80c32a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to disposable hosting or compromised WordPress sites, indicative of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple distinct hosts and UTM parameters in URLs further supports the classification as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8005

Heuristics 5

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=express+pixlr+photo+editor PDF link annotation
    • http://koyomisushi.com/uploads/files/41277525203.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/3599043425.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/63558438163.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/52115717342.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/15/xutojudanitifolubuge.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/narezanefapexokib.pdfIn PDF document text
    • http://cascad-trans.ru/files/firajomumukesazarubaruten.pdfIn PDF document text
    • https://penzion-palice.cz/content/radeziwarovewiruzura.pdfIn PDF document text
    • http://d-innovation.com/upload/files/96328128639.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210914024802131.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613738c14552b---jemixonepijexozafidinuli.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161416251c3367---mozapel.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/kkp1lk4vh4ubo4e4q0cepsj2l3/turumupebu.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/6761635503.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/rerujuwaxutuvitebejilu.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/xatibode.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/32779922317.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/3998998076.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/27718185383.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/67685061581.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/31271891651.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/bunobazojal.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/40739344704.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/zakedewo.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/jakiseme.pdfIn PDF document text

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