Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6350873293d30d6…

MALICIOUS

PDF

77.6 KB Created: 2021-08-13 11:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 8ed0d2bff9e2c71aca6cb1a41d14918a SHA-1: b296bbf67cd854e3e53198314246a481bcf83e5e SHA-256: d6350873293d30d60e9f8cc521d924187120b32caeee0c2f0f4bc0b5f4f2f7ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous external URIs and the nature of the hosting indicate a deliberate effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6922

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 http://kyanite.tv/userfiles/file/daliparazekubaliramubup.pdf In PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8865046c26---vexefatuwupibamuzota.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/6b9b89aa5a1fcc6ece31f64a151ede2c/juxejebumijipozemutuviruw.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3466b3696---99419400130.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/a197t43pnoln7ff1utg1u0dto6/kabusef.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/fe3e4d021019a7aefebf15691a3c0c85/nidexig.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/figizeribavatepugo.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/visitabomuv.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/da33634ae50fd1f7c22c9c6bb505a625/vosez.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724cd10c188---49480729828.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/53960930266.pdfIn PDF document text
    • http://webatnet.de/ckfinder/userfiles/files/fazotepemerojizojididi.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/5366c3e12bef9ff80149d44cb1b81c48/mitixonasiz.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/f1f53cea925409dcef36822ec32e00a8/vevufetar.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acad39b8042---jimosepebifaragilawoto.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/adbf6a3634a2d6ecd3b5a3b346d93aef/5213006770.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/6376457285.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/sawozezi.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609aed80a42a8---zixesopajasivijupenuloze.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/7b5330d93d1a9fa68453632a7d800845/35858950556.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/nududekaraj.pdfIn PDF document text
    • http://meadclassof1991.com/clients/c/cc/cc689d7a74a098ef67b43942063c7ff9/File/82902223774.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/29000863063.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad62f5751da---1253063604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=manuale+installatore+videocitofono+bticino+classe+300PDF link annotation