Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f2be4681124983…

MALICIOUS

PDF

55.7 KB Created: 2021-09-01 19:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6055a7471c7f5f9dccedf488bc03de03 SHA-1: 4e0ada12c5509d7c79c03d3aad1c30da87828005 SHA-256: b1f2be4681124983f85005d29f805d3ab2033e9f17be22216538caa80cdca67c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a link farm, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8433

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://allytemp.ru/uplcv?utm_term=motor+vehicle+act+1988+section+112 PDF link annotation
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/ffl6kgf9o0vem92h1h6dh2eogk/68657604827.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/butejazajemosawurex.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c46507fa6---81576252326.pdfIn PDF document text
    • http://modero.vn/upload/files/vimokatubuna.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcd24d0404e---42701646277.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/al05fhmath9p7i3fg55hcpuqp1/99713006423.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609010d1d000f---tolafumewebuzemite.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c12515243fc---pemuje.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/1245d6d24a3ce7bb0e76912fde2a1084/55997812165.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/febuvenaloxexebiwalozo.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/sapebe.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/gekasorafizo.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/tanibazef.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/7490045251.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/1661o67iff75j6d2q5n32pf0o4/memevitijogenakebudevase.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3c8a26bc4---vanewusedasawemaxutu.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/nepedukepinosik.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9928b8f8b8---kodabiwifepi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/juwemap.pdfIn PDF document text
    • https://bauarch.bg/files/45114750746.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/fimonikotuvagem.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/gigedekutarigokalupi.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210621141048_5jtn8f.pdfIn PDF document text

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