Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51798140f06493b…

MALICIOUS

PDF

152.7 KB Created: 2021-06-11 18:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d652d17db4e748df4f81ea9c1f73d43 SHA-1: d1208d0e0acef553ac634764a656c5f8ad6b8efd SHA-256: d51798140f06493b16d2eff9d72af3e4f5a95a47900e6c584ae64d4d4c4fbc7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to the 'Bhagavad Gita in Gujarati' and the wkhtmltopdf tool, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9646

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=bhagavad+gita+in+gujarati+read+online
    • https://cardion.dk/gfx/fckimages/file/giwovibodotefiv.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075891985c77---88307764615.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a311d2983f2---8151078904.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd0b1743f8---85812921861.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/81e94f2ff45d18ee29f41e835a26faba/24572879697.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/1ee476efd379d8889f46163cc2d7a448/bowomelupafineje.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/1fi5hhvkvh3c5cs9gl2ts5iq16/18398997079.pdf
    • http://www.deep2001.com/images/library/File/wixujejibumometixejapitek.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/nfkkm6ci22jaceqedan74ftihv/92663442555.pdf
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/ninapabebivobiganiket.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b083e54aa47---ritonomem.pdf
    • http://akinmedical.com/uploads/file/xiwidojefumozudu.pdf
    • http://noahsmarinesurveyors.ca/userfiles/file/nefobutazofur.pdf
    • http://arslanemlak.come/file/wesizalugeg.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1336c774f2---17682131169.pdf

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