Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e506ff87fa1feb1…

MALICIOUS

PDF

73.0 KB Created: 2021-09-08 16:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fb48f24a318b3154c3e0fa1276e16efc SHA-1: 1de94ed7a86c2c13cc771a9dca30afbedfc87a74 SHA-256: 3e506ff87fa1feb1bd828d8b1e5d2acc0d56fe22cf8ffd6c137058f30218b6e1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to other PDF files on distinct domains, flagged as a link farm. The ML classifier and ClamAV detection indicate malicious intent, likely to distribute malware or phishing content through these links. The presence of many distinct, potentially disposable hosts suggests an effort to evade detection and distribute content broadly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5973

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mb-classic-service.de/userfiles/file/28503134351.pdf In PDF document text
    • http://12shio5.com/contents/files/bugosebakimor.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/xuvedenufa.pdfIn PDF document text
    • http://bluebossa.pl/files/file/nurawamulegix.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/merosifo.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/29648285827.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/gelalanenufozil.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/69925706171.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/navonotazemu.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/60891001517.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/37305070583.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/xupofasovutonedu.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/witebijuvon.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/lubevutomoduzefaxalunup.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/46691867139.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/22335069546.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136017c72494---45643437434.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/tazipapurisufuxebib.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/xisutebunumagigem.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/vebezidiwanawuwuwo.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/45507939911.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613564ce07119---ximatagamipojigupog.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210903_DAF5ECDEFC17E54F.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/96834376035.pdfIn PDF document text
    • https://lesura.net/userfiles/file/fovesilivem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=social+learning+theory+and+domestic+violence+pdfPDF link annotation

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