Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8b2f7fbd32ff6a…

MALICIOUS

PDF

67.8 KB Created: 2021-09-08 14:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8e0411e0d1e66ade2cb2b5bb6518f9a6 SHA-1: b42fd3a62be7b4041515571420708f80c0abdabb SHA-256: fd8b2f7fbd32ff6a22371ff679273764a90c562bfe0b461acd1f25e801ac8a4f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and is identified as a link farm pointing to compromised WordPress uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to external malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7418

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kaies.cn/upfiles/file/fajinowodo.pdf In PDF document text
    • http://satakantaresort.com/user_img/files/kawekapafosetoko.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210901210749.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/jivutukovomuro.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/21086901363.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/lemutokilozatapa.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/04f05d58017e9763231bcfd557d9f563/dejezozetawekabevinijopo.pdfIn PDF document text
    • http://schokofontaenen.de/idata/sigojugabozuxegigutijil.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/74d85de323887135b8746b2d1176663f/talariguda.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/4963906326.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/39585489085.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/77450036324.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16130e6f3c82ee---gakezov.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/a2eb9e470c042725c6b2e68c9f5273a0/lopopisujo.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/44651508500.pdfIn PDF document text
    • https://ubranni.com/uploader/files/vopiguren.pdfIn PDF document text
    • http://pvvc.cz/files/16217821067.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/17251299455.pdfIn PDF document text
    • http://signauction.net/userfiles/file/pimadepuparudeg.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/48593256672.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=sundance+spa+880+optima+manualPDF link annotation

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