Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e58db833d7c9370…

MALICIOUS

PDF

110.8 KB Created: 2021-07-01 18:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4e80c3439673a353ffece944201402f9 SHA-1: 08bf4b29dccec575d53581e1ea2577da327479c7 SHA-256: 6e58db833d7c93700f2fc5ab36fa2463956fa5c281588dcdece4e95193e37e8b
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. No scripts were extracted from this sample, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5557

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://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/acb12b582b15013628b61b0bfa591ba3/bedixofuva.pdf In PDF document text
    • http://argyleliquidations.com/userfiles/files/nibuzonokusewujeri.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/tasuxa.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/65796703631.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/39369338817.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/logerosebusidafigum.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/78246323223.pdfIn PDF document text
    • https://coevent.ru/upload/files/10050845654.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/tugisatasir.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/82845493875.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/lcm6tq7cvnde787jfb2oj3qcve/misagoteravi.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/jumepe.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/7f063c054891903e3ef287c3f2ee8dd3/wevebagizosi.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1210b9b7e---vujilis.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/27088a0b2f4dc9cd7120e307e9f8b754/vogeviza.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/08181208f30b643c28f4b79a57cc2f89/53054293556.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/lalogedujogubakifuposarog.pdfIn PDF document text
    • https://hanmarklight.com/UploadFile/files/pakuretoduzoruzofabuxifox.pdfIn PDF document text
    • http://fitviewer.de/files/file/rugika.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/e91fd49e7fded21f882f0ece89435d72/wukojexefawuxefopomu.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7394ee929c---55692871767.pdfIn PDF document text
    • http://chromavials.com/d/files/67754390299.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/8e28b01f9dd39c75aae6c0f31d20acf8/53179331517.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b6bf2ceb3---kizatefaxisapexafox.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f60a9898a1---78440660612.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=we+made+a+deal+ages+ago+sex+and+the+city+quotePDF link annotation

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