Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec992dd85c69ef61…

MALICIOUS

PDF

64.0 KB Created: 2021-09-18 08:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1c47481dd2c40e7938965e54a8625445 SHA-1: c8a089b4655cd511a87df96a304944d721aaf545 SHA-256: ec992dd85c69ef61cd2cde2ca038eeb12e35c9a0194e738fea9ebc178ee6569c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. The document body is unreadable, but the heuristic firings strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

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://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/aqpcs2l0in59g43jj415cprjrr/98385787219.pdf In PDF document text
    • http://stattus.com/assets/file/viwulawel.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/kipadalabegadazezof.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613756f934c75---piduti.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/35343973817.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/52370892122.pdfIn PDF document text
    • http://vladekoservis.ru/files/44542236514.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/nelapiditosopisuxabetet.pdfIn PDF document text
    • https://lompatjauh.com/contents/files/32570594989.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132e30684ca5---kinuwiran.pdfIn PDF document text
    • https://506hlapeta.com/files/file/46921605723.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/fejupapilina.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/papezezerere.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/rilosinefotiletovamijaz.pdfIn PDF document text
    • https://isleo.com/i_photos/file/16103126718.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/94964725605.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/fubesowomitoxug.pdfIn PDF document text
    • https://lazerom.pro/media/file/776863536.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/41412050920.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/98835397151.pdfIn PDF document text
    • http://feminella.ro/upload/fck/jolobolitusut.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/16581747394.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/18706095503.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/52590600932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=nice+games+in+play+storePDF link annotation

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