Malicious PDF — malware analysis report

Static analysis result for SHA-256 514b4e540485a648…

MALICIOUS

PDF

56.0 KB Created: 2021-09-19 00:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cfd4f6f3f68f798a494bf8e3a8fd4ce8 SHA-1: 378e1386c11c966ae015109e93e342f88c7968cf SHA-256: 514b4e540485a64859242b21925f1f0ab64afeb324705cc7376083591b94ec3c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of hosting links on disposable domains, further supporting a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7374

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://philabc.ru/uplcv?utm_term=new+offline+games PDF link annotation
    • http://onlineticketreview.com/images/file/juriwubupalel.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/51744332624.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/3019983516.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/sojiwususilebex.pdfIn PDF document text
    • http://odessawa.com/userfiles/file/pefobilolireliwerunufokop.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/gexazox.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/63998457865.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/87345199478.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210909082115_vxfk5l.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/9e447f98849c06688c758a936508e90b/46855745577.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/juzaboxexabibidageweju.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/25018150448.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/xaxasowar.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/pobopidujisogemomeluretog.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614449b125420---zenutezimuwiguwadasifopud.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/fujuzepinugivubekezus.pdfIn PDF document text

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