Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f37d4ec37dcdd3…

MALICIOUS

PDF

63.1 KB Created: 2021-08-15 21:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 737e1affd36bbade8cbffb59ea046cf2 SHA-1: 787b38d1c87d1de34a4785882f1fc2dd2868be0c SHA-256: 67f37d4ec37dcdd34fe6b51612852e945505357031a6ef79b698c11db3181cf1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4211

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 http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160f7bd285f16b---rixurabada.pdf In PDF document text
    • http://artin-intranet.com/ckupload/files/5475390669.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/40851437131.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/2cacc4e1ae7da6d5b7baa91681b12063/natemoduvevibasusegusi.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/16040837728.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/0bf9548367249a30c7584aab7f2857e1/wakewegixabaz.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088197293bbd---zonivemotinuruxaxupe.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/73748987956.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160db87105e70e---35195176169.pdfIn PDF document text
    • http://dgjst.com/upfile/file/14355867330.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/620643cd4e1308e8d066d3b57cad9263/53855182079.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160984bfa75cc5---vugaf.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f5adfac2912fb38c8068a6d16e5a9ea5/76855793442.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/imk2ngkcsf694hs53op5c3eih0/zakaxosokawapevopudedu.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160976e364918b---70052573455.pdfIn PDF document text
    • http://mahkotacare.com/tmr/userfiles/files/49599839581.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/mafalevup.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/9842fbfcfdf111b94fb8b7975cbae968/48717450185.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d3f1a2110---90601674892.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/ni6crlvftvc28j6a5cdl1vn58b/jiwuse.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093ae00e3597---47721422331.pdfIn PDF document text
    • http://hkalc.com/userfiles/91349806946.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc68b802b4---japirutesulotexizukoboj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=jeunesse+comp+plan+pdfPDF link annotation

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