Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7ff42a2592b233…

MALICIOUS

PDF

69.2 KB Created: 2021-09-06 21:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 9690c5b4db7e1b930f87e22c7a418f6c SHA-1: 65a7810a868f13dbd6c7ba5ce148f760cbc5eeef SHA-256: 6c7ff42a2592b233ce91c340f4d105a5b7f4784ab0929ac11cf5ded9144140f5
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 a link farm pointing to multiple compromised WordPress sites and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs and the heuristic firings indicate a pattern of using compromised infrastructure for hosting potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7138

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 http://kripasec.com/userfiles/file/27942214158.pdf In PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a095b90392---tirezoje.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbba07d0d5---22057598133.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf31ad0aa06---1798226046.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95fc4b1eee---31631485026.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/86342096266.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/sotegubivega.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728a013f34a---42514154669.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/vuxedezavazenajazu.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/memezinosetisokipovut.pdfIn PDF document text
    • http://dezis.ru/uploads/files/67277474520.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/xaniwaseliponogavetuj.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/71605317824.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/5014509136.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/e5e5b688183bbadf89d40e01ca1cebba/kusoxasakenosevug.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/kakigarotul.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/ndnogof772fbvugiev99a741nq/90557266510.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/vawenanofixam.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e59fd8190c---xopipufufo.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/64402706306.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/miwip.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fdf3168e486514ca614989f8f65c8201/rijivorigujegomulorodu.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b93a6d4eee---kitasuvatikeza.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/vetafagaduzemuxikozagi.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105e4f04d89a---nenakopapotuj.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/tufuxesemafatuxusaga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=convertir+planos+pdf+a+dwgPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D3 10856 bytes
SHA-256: dbb6a790fbe0b524356783816c876f8756b8d162397e7dc144a276e07cef24b3