Malicious PDF — malware analysis report

Static analysis result for SHA-256 2201b08aec791f31…

MALICIOUS

PDF

53.9 KB Created: 2021-08-18 20:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c6e26a6158fb9de4968c1c309c049120 SHA-1: abc7023b04f83b1be8cd217ae3db8fa103d4ab45 SHA-256: 2201b08aec791f312a3158dbd4305032e845aef6943d3d4a50e0a85d109a8355
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm intended to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a pattern of using PDFs to host a large number of links, a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7621

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://pixomot.ru/uplcv?utm_term=ap+chemistry+multiple+choice+pdf PDF link annotation
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5ed4d73b---29417537527.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/78584018190.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/puvikuxaxofawuzu.pdfIn PDF document text
    • http://faradbox.pl/files/file/84305874565.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b4a069745---48491480791.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/41393401522.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/5bd33d4e1fc1d497e12c3dab54238a26/46329636406.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/2363893619.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/009b710af3143a7eba14e2efe3c7817b/tijobodadopan.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/povudunoje.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/kuzag.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/ba64665270145f4bfc0a41a913e528cc/23353094567.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/vddq79t3ijflja75nrk4uk9gcu/ligapewifeduzite.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c14ba890d93---80478747482.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/87391449314.pdfIn PDF document text
    • http://eko-uklid.com/files/file/gelofunonejofeliweruli.pdfIn PDF document text
    • http://446888.top/userfiles/file/silajaxexiluzixemelanavid.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/buzeguvorutazavelezojef.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce5a6ce28c---vivuminukuni.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/72379730156.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/i4etl5mcjf2tburmc74qtsamrc/29724133685.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/fagirunorudutegeropewu.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa09be8d75c---42499303447.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098877dca483---dapavobibupugufomokutu.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/361852248.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160773376a83fc---69846346623.pdfIn PDF document text

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