Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d50da6b538be8c3…

MALICIOUS

PDF

64.0 KB Created: 2021-06-17 14:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ef00331bf06cfda5ca06b58afed4e23a SHA-1: 44b3938f5dd13900784246fe2254fd5bf4a6de43 SHA-256: 2d50da6b538be8c35c60612120aad5a6b410805f4cce736c1bb6faaa369bd491
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm pointing to compromised WordPress upload storage, aiming to trick users into downloading software. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7605

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://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/33366c41aae5c5c4f09cc23ca70a3d03/95085110070.pdf In PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607374896cffe---bivaripamusexezu.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/d9d4d3jodn50n49pdjcpekfhi2/57666377268.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/ff0473cad9205fb1e1e502a8532f97a8/gafilizelefodabuvoteb.pdfIn PDF document text
    • http://meta-min.com/files/bepafosorokido.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/52907533948.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/zadonitojafubevetinil.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdda49ff71---41266177206.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/dhqvgm6g9q6qhel6l45olms1o0/29735143708.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/7mvjitjb4shp4arpsuj9v6ln60/saxowiwifekeziwig.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/fa2517166e27ce116027ba960081d21a/99535816386.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/6791d8730b7f29c3e70f417ce416d0f2/zelelo.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/vabajapujegu.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e01ee527f0---xotemos.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/2962hva3ltu8to1gh87pbbf0a5/47302067378.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a06e416771d---lokidapixanibaziru.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97ed6ea0f9---40295146322.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=winrar+for+pc+windows+7+64+bit+free+download+full+versionPDF link annotation

Related samples 8

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