Malicious PDF — malware analysis report

Static analysis result for SHA-256 853bd4d3dad2f41e…

MALICIOUS

PDF

51.9 KB Created: 2021-09-14 12:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c1fbbcb5dc3454bcb2e3388ec3747150 SHA-1: 19398c41945c70924a59ea82dcfac0e34c7edb21 SHA-256: 853bd4d3dad2f41e4eb52a525481e91b6e41cf9c5e827db21b1f74e401148176
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to domains that appear to be link farms or disposable hosting, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6164

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://allytemp.ru/uplcv?utm_term=como+ativar+conta+google+no+android PDF link annotation
    • http://kcde.kr/userfiles/file/vifedezokam.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/43510072363.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/pepexituduwimebanaposi.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/74556919562.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/54130586716.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/89933226361.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/bulaviwamadexitifakovo.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/kenofagulad.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/85378845466.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/vidajogorikagowir.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/25226601447.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137e356d4dfb---taxapuruwij.pdfIn PDF document text
    • https://mimpiindah1.com/contents/files/tupawi.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/manumariketelebezater.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/93354082336.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/80494442191.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/begivibawezafifomed.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/jexukafoburube.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/bipekopujumovoxudepawux.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/lukuwumixuwugoroze.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/mivugi.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbdbc59f28---gozus.pdfIn PDF document text
    • https://wecareprogram.org/images/file/87106478280.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210904080044_1436434961.pdfIn PDF document text