Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ba65528c1a97da…

MALICIOUS

PDF

82.5 KB Created: 2021-07-18 01:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 1c42d70b93b85dcd790e9e3ce4d4f233 SHA-1: 8eb42e4de2fe0c7952c602a562454359dca20552 SHA-256: 25ba65528c1a97da4ead18fa339b5e89b9f1d61d2e67c6d5b3ca0c4bc3ab762a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4833

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://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0b707b93afc5680ccc2c7b6c0931099f/veveduriju.pdf In PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bcc4eb2cc---mupakegagipizato.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/ripuvazizafijas.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/58313833283.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/sexazegupusa.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/gixabenuzotokejivusot.pdfIn PDF document text
    • http://caramelitos.sk/files/75978546095.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/qlolb47sbhkkl50u5dq83mg2i5/72736833498.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/45037225576.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/80048768537.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/letez.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/tozukokogo.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/2e1fba9738948bdeeb7bfcc6627923c6/11091414500.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607a146d8bfba---vogejixibinilapuk.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/nekuno.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/kusupufikijejetirezexon.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d8d63d1e701934bcb08546bdec7dafa0/43180119112.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160ba153d448d6---nurowobor.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d1a984f29---885792645.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/ca68e3376ca0eec85d6d00ebca073681/mafolufixujepe.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/k9h0ufl4kf07gg1ejccqalom5b/81396016253.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea01155f47---72747293354.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/7eb4fe573219a8882982cfe1e1ae2d50/sepazeguzafamulazujazik.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/52868952183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=earthquake+analysis+and+design+of+structures+pdfPDF link annotation

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