Malicious PDF — malware analysis report

Static analysis result for SHA-256 5218bd7550c9a91e…

MALICIOUS

PDF

47.8 KB Created: 2021-09-27 20:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a959c121300af07d9f494f146d02e3a6 SHA-1: 40238d929fb1a7ee5dbadbe2731098000f8aae7e SHA-256: 5218bd7550c9a91e1a3dce3c81fdd77a991b55447c3a6e847d0ed2b90bec6792
124 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable domains, and exhibits characteristics of a link farm. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags it as a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5934

Heuristics 4

  • 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.
  • 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://purmoradiatoriai.lt/images/files/votesetosotofenipeba.pdf In PDF document text
    • http://sreema.org/FCKeditor/file/kizikuleraguna.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/33847049777.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109121850591544.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/50447729098.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/b2p0dh98ontoafm87pi1fdfbqr/73842189465.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/91506226485.pdfIn PDF document text
    • http://porpora.group/imagenes/imagenes_contenidos///12804774719.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/xoredizuro.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/lojojeb.pdfIn PDF document text
    • http://protezas.lt/i/File/logidafoxabiduda.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/6146ab5bd9673.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/koxip.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/davalabu.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/pajoruw.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f26fee44d3---gubenisopoxajev.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/89495350098.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/diwodasuxesujana.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/48341721560.pdfIn PDF document text
    • http://fourfoods.com/images/files/40722251362.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/zenipujoruseloserad.pdfIn PDF document text
    • http://servmed.net/userfiles/file/porisilenelixezixiwoxi.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/87081983476.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=secret+lives+of+the+super+rich+full+episodes+freePDF link annotation