Malicious PDF — malware analysis report

Static analysis result for SHA-256 578f51ac265ca937…

MALICIOUS

PDF

53.3 KB Created: 2021-09-16 19:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b9365ca9d7d6b345f217d76aad3e260a SHA-1: 7f9061afc515f88d14e4da270215c5496c96039e SHA-256: 578f51ac265ca93704181004f89fbd46fc94a25648913d828aeb0e59f78e83a1
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that redirect to external sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting and redirectors, suggesting an attempt to obscure the true destination or host malicious content. The presence of multiple unknown reputation URLs further supports a malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5820

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 http://www.humillacionyestrella.org/ckfinder/userfiles/files/20121421638.pdf In PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/13490791014.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/47475351252.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/zegolu.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/6521104314.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/sijiwanoreropa.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/gubovebenutapa.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/nunegoputebonedofuwide.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/gajajas.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/54436123321.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/7145040910.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/54333357566.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/bogevuporikitiz.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/78574210633.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/jugeka.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/muwogitaderiw.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/53056872073.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/71793487172.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/121343448452.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/49865056703.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/mosojesikik.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/18884540797.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136fe07b3c10---poxabuke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=gta+download+for+android+without+verificationPDF link annotation