Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d6f900e692e81d…

MALICIOUS

PDF

77.0 KB Created: 2021-09-15 16:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ffc75eb45086d489cfa7ee8d79e0cb20 SHA-1: 0a5f8eff0c5350c05c6e8012650059bc771e47a6 SHA-256: c0d6f900e692e81ddeff758c7892e4b8162486c7c4a81162dd10e3aedfed26e1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to external websites, including those hosted on compromised WordPress sites. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4752

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://creativitagh.com/pevron/www/img/file/11312797200.pdf In PDF document text
    • http://lumieretvie.com/userfiles/file/95439046471.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133002c5cf2e---sorukanibufoziwawano.pdfIn PDF document text
    • https://panama4d.com/contents/files/24798733090.pdfIn PDF document text
    • https://vhcvietnam.vn/ckeditor/images/files/fezebatitop.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/dukunibunukiwavelijalukex.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/10137769630.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/9665561589.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/613c3a0354148.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/0fae7434b010d2b4c42701eb740a2978/56493983781.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/matalikumukedumilob.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/dosafejunaxejiw.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff9e9ee7a6---36118200556.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/vegisepu.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/73947863787.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a816894d4---76837191829.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/e64565d8a1c8958ac27b25d7578ca297/maxafaruvekukekejox.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/49124114044.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/gunosogikamosu.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/2391812654.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/ferepovezadakawomugad.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/31092343561.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/c7dfb442969aa1130c1016c3ed60b760/telalakefawefux.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/temiwiwofelarenuwe.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/14707794571.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=fundamental+economic+concepts+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 10756 bytes
SHA-256: 11d61270e3febce6325d5da240ba49ab8456a2738ce2747b4d9f9b37af9c9f1e
font_01_sfnt_off0000ffdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1