Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7404bf968ef4e9c…

MALICIOUS

PDF

54.0 KB Created: 2021-09-19 08:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 13d2532770b224ddc19c2aefa6604f54 SHA-1: eac30b8d2648498b9c13acf9f36092a0f06b846e SHA-256: b7404bf968ef4e9c3d3eb5d348bc64e5af029740728162512eb4394853519d32
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host numerous links, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6015

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://velkoobchod-man.eu/ckfinder/userfiles/files/luxopotegun.pdf In PDF document text
    • https://broadcasthub.com/ci/userfiles/files/72592582556.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/39022896800.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/futufupezixizizevutaganim.pdfIn PDF document text
    • http://vestmorecapital.com/images/epost/38754290364.pdfIn PDF document text
    • https://dnm.tw/uploads/files/202109101519197666.pdfIn PDF document text
    • http://gemcom.org/userfiles/file/dosoluzipizumizuledep.pdfIn PDF document text
    • http://greenld.com/userfiles/65875574722.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/1982020227.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/zapojo.pdfIn PDF document text
    • https://stichtingech.org/ckfinder/userfiles/files/sazexeduvamidunanopobaxu.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/43926010835.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/39910137090.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/91088400101.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-9-19/20210919024242861175.pdfIn PDF document text
    • http://mgrima.com/files/file/33697238634.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9d534682a---15856816446.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/majomutulugusudapigusa.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021091019324934.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021091910160273499.pdfIn PDF document text
    • http://ewtch.com/upload/files/44843268599.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1630963131.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/5larr7lr12tqcm7ra10djnhtac/zozilumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=bhoomi+jayam+ravi+full+moviePDF link annotation