Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a4c00a7a59a7b95…

MALICIOUS

PDF

53.9 KB Created: 2021-09-04 04:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80783da14755a0913273bc0b2d1eaf4d SHA-1: 59798e0c68d2dad3a7e9ed9f4f1002042057d9d4 SHA-256: 3a4c00a7a59a7b9540728b32d125c2fc3a710bd4568a61d6dacebd7a6ac8c0ab
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 an ML classifier. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute further malicious content. The presence of multiple PDF links on potentially compromised CMS upload storage indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6735

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://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/faee4c4358aa30b2993789a679c9c304/gagosow.pdf In PDF document text
    • http://delve-cr.com/uploads/jalutulinazexelez.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/midalukatodogala.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b794777974e---45276297331.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/darawufiwukave.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/75506945670.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b80ee89c27d---28709503074.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609211153b8bc---mukaxesazulemi.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/79720244519.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/3djk6cvnkcg0r8pt2jt8dl9tj3/51628388781.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/64766711873.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/37680736077.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/77bb67e837a584f970bb6e96024510c6/dezisujetuxe.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/158e2ed206729dade68d4c9c138b36af/gasajolegebu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=autodesk+maya+2015+tutorials+pdfPDF link annotation

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