Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0a9105e8246fff…

MALICIOUS

PDF

57.5 KB Created: 2021-06-14 01:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c66512118dc1ff4b2f5572e01d4e829 SHA-1: 574fc2ccd029c353dd5ae4a2845e6c15adcf2b63 SHA-256: 4f0a9105e8246fff55420e9edbd2dd28b0a758006cc7d18f8b67295113d5917d
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs further supports the idea of a campaign aimed at driving traffic to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7545

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://cructi.ru/uplcv?utm_term=beeg+boy+to+gay
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/co1blv3lhupqacmpk7unkuke5k/59116284639.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad9e77a596---388733516.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076816788b57---48500542924.pdf
    • http://zahradysnapady.cz/soubory/files/ledipugudedomanol.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/jamatirikewogabu.pdf
    • http://sacoorhealth.pt/site/upload/file/48144136790.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/682bef1edb6badb213f8138d986ce890/gipebaduv.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1274708ab6---82553292556.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bdab300debf---wazizekefokaviduv.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d08998c4c8---51999137006.pdf
    • https://aimhc.com/userfiles/file/82719979183.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/086rei890bv0c3gd66b0uthgna/supalonepogipupudaxuzo.pdf
    • https://calmoinc.com/upload/editor/file/57555768109.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9bc1e6593---xijapitufulipobimakada.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607776cdb8224---44403248010.pdf
    • https://nepalimodelagency.com/userfiles/file/55673509606.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/2638800675.pdf

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