Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a4caaff4cae46f…

MALICIOUS

PDF

54.7 KB Created: 2021-09-17 07:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7243ee87711e059c07a16ebaa4b91551 SHA-1: 5d7e5593b340a2d524b2ee7ef74cfb22d73f113a SHA-256: 41a4caaff4cae46f177fa56cdc30f27b2b3be8f65c115a20989b02e2b2fd6b35
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs that point to disposable hosting, characteristic of a link farm designed to distribute malicious content or phish users. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7449

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://philabc.ru/uplcv?utm_term=home+design+dreams+design+my+dream+house+mod+apk
    • http://midesignvn.com/uploads/files/41110289564.pdf
    • http://bobmeetin.com/media/galleries/files/notuvozifana.pdf
    • http://designklasse.de/ckfinder/userfiles/files/wekejarinoromowukukaka.pdf
    • http://xinyaoqiye.com/upload_fck/file/2021-9-4/20210904094404972886.pdf
    • https://vjlabor.pitscovn.com/uploads/Upload/files/85476429632.pdf
    • http://wadsoda.com/UserFiles/File/libalamosoxadenanimir.pdf
    • http://mawratanews.com/armedia/uploads/files/vupopugotujolojanolura.pdf
    • http://traslochimontalto.it/userfiles/files/xadawug.pdf
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/48481533585.pdf
    • http://sattosushi.com/uploads/files/sedetadoforuwuzopakino.pdf
    • http://avanti.pl/userfiles/file/zuwinifusozaguxokonegi.pdf
    • https://lalicorne-hotel.com/userfiles/file/jivuzifimatuwemufari.pdf
    • http://akgwealthplanner.com/crm/files/wonapajekobadugafuwozix.pdf
    • http://aow.infogestnet.it/ckfinder/userfiles/files/48764116767.pdf
    • https://xcheck.vn/uploads/userfiles/file/39378808809.pdf
    • http://polipadel.com/userfiles/file/39150684087.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0c45754de---11754998451.pdf
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/xofotolozile.pdf

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