Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ed3cac3d54ad2f…

MALICIOUS

PDF

40.0 KB Created: 2021-07-06 04:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: da26a5b3ab61b9f7c90722ecc0af8d70 SHA-1: 26d6e1974108087eb76c2f276d7279fe98f2e0a2 SHA-256: 00ed3cac3d54ad2f04408b21346277239b9ccf1e9816ff818cf30490d1cc6234
114 Risk Score

Malware Insights

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

The sample is an image-only PDF, a common lure technique to hide clickable elements. Heuristics indicate it functions as a link farm, pointing to multiple distinct hosts, many of which appear to be compromised WordPress installations. The ML classifier also flagged this PDF as malicious with high confidence. The presence of numerous URLs, some hosted on compromised CMS platforms, suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8821

Heuristics 5

  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608075070a246---77256935698.pdf In PDF document text
    • http://asiadomainstore.com/userfiles/file/woxatamuruvowepuposu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608325093f941---zogitabapu.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/28110144035.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/14879779918.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2d417e93a4---wuwizeroti.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ca1416e33---feravorisexinuwa.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/22533027488.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/1a731633e6643ec27893b92ec9528cde/97309583114.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa178dca06b---miwazademaxedufuresun.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/22959075531.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/8e20f6f9b8b224a0644fdd9d850a1bff/darili.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc69db77f8---tejomegejuzawak.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/19528312986.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/d20c7350858fab0ff111e5ec9167ac55/84042953258.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/32d700c2a260c42cc3bf8578fd4b1073/bitorogazuv.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/9190cb74a1020b002574dbbd1cdb7bb6/kuremuwugula.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/b8d7a057df3abf53e2983b67d89356aa/pewikunarejisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=6th+standard+social+science+guide+pdfPDF link annotation

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