Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b67cb6b7c8c0ef…

MALICIOUS

PDF

47.0 KB Created: 2021-07-03 11:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 91025ca16676fd3f3335be07eef5970f SHA-1: 389bc03bf861cda842a72e319f7c9e676437ec78 SHA-256: 53b67cb6b7c8c0ef766e6dbe14720575afe084175245441044f4895b3ee74a33
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a lure to download further malicious content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to deceive users into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

Heuristics 4

  • 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.
  • 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://kiuruvedenlukio.fi/tiedostot/file/kikogikokelosumekugazex.pdf PDF link annotation
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806127ae1ed---79941947345.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607527c3526a4---57969375276.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91afb02198---73678909670.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095da3181776---zanojuweb.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/357d1d19c6f9362e3e407d7b8c24b139/12131940158.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/11221468307.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/9076c290fe8f96e432518ee93ca79741/vewesuredumubu.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078c4896bd95---barozikasi.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/61099ae0fd354179e81898559d4e5a9b/71556129823.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/29543314519.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609405487ba95---43001424876.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d07e798ec570217ba8b4d1f93d5a70d9/46058399633.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/j35dshj0v1peo18n1cg00a78di/15937464158.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/f188678978c9eb0c99d49316533e751e/zazewonesiradigetukovuruj.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/nijeguvufenedizexov.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/kinevakuwitusa.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/a4a6kil0sl9s2l8pnkdjpl03st/wodinoxozegebudo.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/78960020758.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b57d85d0c7a---41020746128.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/1cc7019f725da46ff0b0c58b7d38a729/pewonow.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd5655d089---xowiranaw.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/kituno.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/35219fee0c8566b71591f3b659dbb21d/zixuxumiwonodul.pdfIn PDF document text

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