Malicious PDF — malware analysis report

Static analysis result for SHA-256 53853a4dc3d30bae…

MALICIOUS

PDF

72.0 KB Created: 2021-06-26 22:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 8b03e21ff40944b1688dea4d6d5ea93b SHA-1: b23f169919fd375e12b02d2e732cfc6f42fd10c9 SHA-256: 53853a4dc3d30bae52523dfdafd12954587504ba6f24189519138e885c9fb5d7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous compromised websites, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan. The embedded URLs are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4729

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 http://ekolojikweb.net/upld/userfiles/file/belatozinezu.pdf In PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37a8579d45---vebigi.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/hfe2qmu8b7o2p4g0t8jsliau0p/5670101246.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/c67419824dba2eb86c3b13fcb64d03b8/puviguwowemufiwi.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/fasopadev.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/181035362.pdfIn PDF document text
    • http://teraval.cz/res/file/65131438426.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/riwibubapudowima.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/968a7ecc812e91834bf4326be78dae9d/zanulijuti.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f12b2c0a19---fofuxu.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/26562801752.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/tu6s49dfvod7hv7b829ipm1bf0/domidetaw.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/76587541107.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/90d8df81f688c96f72ad8c62394392b0/rerarujavidadazonoxa.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162206597661.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/57814351186.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddefd4d7e8---80474010757.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/zajekewajuget.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/2296090198.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/bidifefo.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0dff38bc73---72368026665.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/b1d98b3574f327c81b104523c5ddeca7/19574912171.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/45842199381.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca058196640---vadeburojodadewono.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd78f18e0---95663902061.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=need+for+speed+hot+pursuit+pc+trainerPDF link annotation

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