Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda3ff59200cc0a0…

MALICIOUS

PDF

54.4 KB Created: 2021-05-27 07:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea66f829f95cfc9808d77b6f5f0ca03d SHA-1: b9ef6a32c11a1b35338c0d1e9a3591e111f08bea SHA-256: cda3ff59200cc0a0d4ed016e3ed973290be6dd898609ca1bc445eb644d0aa608
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with multiple embedded URLs pointing to potentially compromised WordPress sites hosting further PDF documents. The primary purpose appears to be to lure users into downloading and executing additional malicious content from these external sources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9812

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 http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7a8258633---6432582361.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/41t673a0jb8j5nbh5h0frtsaos/47185289935.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d588717551---1638674412.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd224e6ad---gixube.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608318cf1262d---piruwuvu.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094cd489756c---luruzora.pdf
    • https://baobihungphu.com/media/ftp/file/75082405621.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/b9ed95ecc15c6700be0877dde3b54e97/mosasemenevowipubovotemem.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829aa38e98e---lutakixu.pdf
    • http://fxmeat.com/upload/file/b3ef35d03f6c687559a51387fe9e3923.pdf
    • http://albino-pitti.com/pub_img/file/zesuzosikirutudubaxu.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072416284958---dutomorifox.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/1f3e2dd4fc2006b13f2f896d42933b46/kixefikepub.pdf
    • http://webursitet.org/Files/file/rawawabagujiverofogovut.pdf
    • http://alliance-ltd.com/userfiles/9100362330.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/1eb2326ca300fc6572fa18d2725ba9a0/dizexoxa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+long+should+you+study+for+nremt

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