Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d53d9f531916e40…

MALICIOUS

PDF

61.6 KB Created: 2021-09-07 20:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: c41aa1eb917f5cfba79edad241c84347 SHA-1: 3ee0e3ced171fa5c037609e3706a28bf4f382c86 SHA-256: 5d53d9f531916e40c81f19dc16bcbe2e8f01bc6d9ce8d67b326c9cd81c11e68c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to compromised websites or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm suggests an attempt to obscure the ultimate destination or to leverage SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6040

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://angelcabrera.com/FCKfiles/file/nuvarizedefotasusavidu.pdf In PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/73582004149.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/37516564147.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d6e03af65---2007741496.pdfIn PDF document text
    • https://www.nevjegykiraly.hu/userfiles/files/79496696668.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/tosodafusalawonaxi.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/pobupatuvekawuw.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/mivofujepinofalarimewe.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faca8b24bcb---44865724831.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/09chn0fa7mnq00jl5mgk921mv4/39517986127.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/15776041523.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcab0a5141---tevutenimifadosifelis.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608878493777e---86237836642.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/23527025936.pdfIn PDF document text
    • http://waltwhitmanclassof1965.com/clients/c/cc/ccbfa8a87e297cd67510599b8aebcb74/File/94011767527.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/b4e34e164741be923bfa6672435274cb/46600733418.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/mozaderolebiwazunexi.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/gemejezazovase.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160836a2026884---70689105305.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/demigudimiboraxobadowip.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c9560fb4124---88494599453.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/46419972694.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/86461883654.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb5cb60ce---31089963013.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=addis+ababa+city+administration+housing+agency+condominium+winners+list+pdfPDF link annotation

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