Malicious PDF — malware analysis report

Static analysis result for SHA-256 d659cd14db76c977…

MALICIOUS

PDF

62.6 KB Created: 2021-08-22 03:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d7fbc676b159f1b79bc33733dd329e73 SHA-1: 0206c201eebcb19b78f53ba5f0465c3c9e80d260 SHA-256: d659cd14db76c977a75d18eb041a0f619643cf32921d7bfa6d15c5c29b3babd7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8795

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 https://smidgel.ru/uplcv?utm_term=mathematics+is+god+silent+pdf PDF link annotation
    • https://gobelsprofil.com/upload/files/pobanogasuka.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/1aecff774869aa2e3904db0ffb7ba4a7/46769355073.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/20181905986.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/68ea73cc77d63a1e97befea8dba6b3e4/19066827264.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/bugitepopidubodezukom.pdfIn PDF document text
    • http://indecomavo.pl/userimg/inc/bexaj.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/37716015306.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16075717a1d26d---norekojemeve.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a192a5dd5---guzujamalugo.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/kegarubuvotaf.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/6ca73f42d4afcf1aabc72af6d937c598/xuvojamagutaworubiwuxi.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830e494c221---gawalaveto.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/6b5a43e925f993d3e6d36363eb3d918a/zubapaxuzuwinelu.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/igm8se3feu34l1v9vuqogg5cd6/31981060644.pdfIn PDF document text
    • http://lossfundraisingevent.com/clients/f/f5/f5ed5e364f2f51aa46a4c5982fab9a07/File/jenejafat.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/89981802392.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/3mnldgk9tcineqn45mago5j293/mijijuvepazaf.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/66175133004.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/fesuti.pdfIn PDF document text
    • http://veterina-naslunci.cz/userfiles/file/gotuxafu.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/a3b78c467d829c3948261af074c2a4cb/vazoranavolune.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/jexusi.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/qrq13eg8cpnmf03vgru6a89jn1/52836514687.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4u5oh3kpjiu5m7iitrnpt698at/sakasivuxex.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/5v02sl8ocefm0g87l6tcq7rbo5/kokadevunetepuwoji.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edf7cac0d3---genenetinebuxuvo.pdfIn PDF document text