Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5c393847401d7b…

MALICIOUS

PDF

48.3 KB Created: 2021-09-08 06:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4707bdaad1282189143d84f251d0e6d4 SHA-1: b8b672e8cb150c361444fd782172033b559973dd SHA-256: cb5c393847401d7b8cf42aa7189eec9e67fefbfd8bdd605385a1aba400271b60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

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://huntic.ru/uplcv?utm_term=structural+steel+design+5th+edition+solution+manual PDF link annotation
    • http://oaklandscreche.ie/userfiles/files/96317677889.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/90805917099.pdfIn PDF document text
    • http://cbwmd.com/uploads/Files/rekozajawowobi.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/5130979802.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdaeb2fcee---nojorov.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160806ccc40a2c---2922969154.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adf30ac7d4c---lofowisexoxoxavovokoxe.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/fazuvurikaxodemot.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210712_14D9542970B8DC39.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/bivelesov.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021052802171973499.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/xizusaxiludesixato.pdfIn PDF document text
    • http://51www.org/uploadfile/file/03bb5d1567db96df44b43313c18c9b56.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1a54c8fa4---93302307220.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/zuxewotamujewado.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/20157914652.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/kmpc3al548pr0qkf0c5dsk8p7k/jizazoperogaxitu.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/0i2nmltrdpue34e18ioj2ms84d/72873207008.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/87405732081.pdfIn PDF document text
    • http://tencanpowder.com/d/files/wakilatipiwi.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd9b96bbf5---dexolawesovorefekexomone.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3f5aef567---namowudigiterasotasa.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160dae10772773---5166489729.pdfIn PDF document text

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