Malicious PDF — malware analysis report

Static analysis result for SHA-256 4915bbd74d1cb194…

MALICIOUS

PDF

66.7 KB Created: 2021-06-16 21:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8538a20abf5cd7c28ae82ab3c866da4c SHA-1: 8987537e404ef5c23d7353975f160af5099ac2cb SHA-256: 4915bbd74d1cb1943b86d5f376cf64bdb73b915f17a34b1762b54f5c6b578a69
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting sites, likely intended to redirect users to download malicious content. The presence of multiple external URIs and a link farm structure strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6626

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://garglob.ru/uplcv?utm_term=tencent+gaming+buddy+download+for+android
    • http://statewideroadservices.com/clients/879378/File/sutobijudab.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8deb391f76---nifezolusepenatimasux.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/42064984364.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609739b29ea0f---79262900619.pdf
    • http://www.bash.cl/media/file/3811198117.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/73cf4de740cb0feebf3c3009ced310e7/kezubuzafatikaxefejewan.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de66d0e0f0---38357817957.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/6b673ef674c963ad62ab95d0ba10042b/bixibom.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14460b9b3---gokubilepaveparixaroxo.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/f4c778cea18b2b06dd9b0201646dfe5a/kesigatagaba.pdf
    • http://mynigaoe.com/upload/file/20210607013440.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/fcafc3bc2c093e39615317175d658d78/46524573146.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884ee2221e8---15419730135.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ab8566358b13bd0eb6137dfe2f962e6c/pixolipide.pdf
    • http://fresh-j.info/images/uploadedimages/file/migumuvubig.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/d9u59836jnrnk3v6rhlv1nkvm2/pejekukofakebo.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/c08f906f4000b5ac20246682cbab5edc/78403381645.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a34077e783---borixozinodan.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa32cbc7a62---13549671497.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607812465e968---betonolodito.pdf

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