Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb99590c42f7c94…

MALICIOUS

PDF

52.6 KB Created: 2021-05-12 21:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27be79cf533cad6bb72d8a1db9e5e2f5 SHA-1: 399fdfc3c6b9ab5582b26e2f8e957aeab6472b6c SHA-256: 6cb99590c42f7c94f74a66e2aad3fc42d047470295ad8e622adaf40da3a6df5f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and ML classifiers. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to programming tutorials, which is a common tactic to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7183

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://almondzwealth.com/administrator/imagetemp/file/pepilatizanobo.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608223ae2131b---xibenaxinebofolixo.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/l63iv30jdai74o96eil2btjdof/51276404507.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a50ae6c4c7---xaromugubopijex.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/f66649a9bf964c10af30a3bfb7fb9a2b/gikutezusisoka.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/88d9526de0c79e7a18628e83a0cfa73b/74530313648.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607aefeae9add---pusedagok.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c3ace188736915784811bc63219f9a0a/19352101285.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823910353ec---70996562088.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d85ec955d20d7ba3000775c6e30cc41/4033145750.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9cfb84531---67245170383.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/bg1lih3glokgc4o4sqbm269nsd/63565879590.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893f864a74f---2688566069.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607306b12576d---fudogenup.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/3a068bb33641650706bb0a70d35c3ceb/20490270624.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n6f42hnl5b8ottdvgf16us3qm7/87513255125.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=c+programming+language+tutorials+point+pdf

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