Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadad91a8e8c0078…

MALICIOUS

PDF

41.5 KB Created: 2021-09-28 21:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6af2656de27ce85bbeed05a2f4613e53 SHA-1: 05d34ad0d94b4f87e6b645b4f46af661b3e5f8b3 SHA-256: fadad91a8e8c0078d8117813cec3eb709244c4d62d90992d757d52c326078694
144 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable action. It functions as a link farm, hosting numerous other PDF files on various domains, suggesting a distribution mechanism for malicious content. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7020

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://britishcytology.org.uk/ckfinder/userfiles/files/bidadunozomaguzisi.pdf In PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/mirelidi.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/xerelusodo.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/79479535277.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/pogapozuxatisasizivufok.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/82987525997.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/muxajuginetek.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/kipilotepenotovuvaxe.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/29103658188.pdfIn PDF document text
    • http://lex.tj/img/file/20544125749.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/67857959652.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/dimiwafokevafup.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/24631188252.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/52495656798.pdfIn PDF document text
    • https://alpinashop.rudy-ra.com/files/vapoponojuve.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/29427780262.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613580d950967---ratotinakimizutevidukojaz.pdfIn PDF document text
    • http://hmed.vn/upload/files/79785309308.pdfIn PDF document text
    • http://countryclaim.cz/userfiles/file/fefilodogaredol.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/60004114908.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/39651198910.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/edd35240c676b112411b1ab28b0b19fb/55128165001.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/zugotima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=best+photo+editing+software+for+windows+7+free+downloadPDF link annotation

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