Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fee54030010a0a9…

MALICIOUS

PDF

46.8 KB Created: 2021-08-15 12:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f7ff20c8d8681f5f7837c28a2de7adaf SHA-1: 411670e93666321abdb06454c15492586ee90357 SHA-256: 3fee54030010a0a9056ceb5ddbaf225a4586a13662c539b9cb62707460dbdccf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9202

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://pixomot.ru/uplcv?utm_term=how+do+i+turn+off+call+forwarding+on+my+nortel+phone PDF link annotation
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/19f52fb2f9f6fe5697f0001f9c1928cc/95351820095.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/9847767965.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f178d3e4da---lutuwitevutoganawakez.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16216826639179.pdfIn PDF document text
    • https://interface-graphique.com/upload/editor/file/89730924451.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-8-13/20210813132337583442.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/096afdb56bfb51fb916fd7ff4119a565/duwugajugujopokopari.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/40838523591.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/m8pl176g7ohbadsd0rqn04iu15/bolijaxisixakezitoxomir.pdfIn PDF document text
    • http://lowchens.org/userfiles/file/53205553042.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ekbin62of31sner16n8lngqo21/nejogezivanopepedijo.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/38a2ea8fcd32498098ee9dc70ede20eb/30331544390.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/67326525578.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b25317219.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/35534136381.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/88588922538.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf2165572c---64822218563.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/62624711247.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/zuxexavonewurefawotonoton.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/kitedevof.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/sanipekelamumetu.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/sutimijem.pdfIn PDF document text

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