Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90fba332481f576…

MALICIOUS

PDF

53.0 KB Created: 2021-09-22 11:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: da3b1a2aed06f75fc500ca0ccd22e984 SHA-1: f0e3d98c1490a8963a11215310621a56e57996e6 SHA-256: d90fba332481f5761a77e12fbf4d81ced36e0d34040c1c8c5589eb897ffd0de8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links to other PDF files hosted on a variety of domains, many of which appear to be disposable or low-reputation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The PDF structure and numerous links suggest it functions as a link farm to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8038

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://chcial.ru/uplcv?utm_term=top+ten+biggest+economies PDF link annotation
    • http://jiangsutravel.kr/userfiles/files/20210922_152353.pdfIn PDF document text
    • http://peter-crooks.com/userfiles/file/lugawitut.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/15322563202.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/temugepiven.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16143f794702f4---34678698639.pdfIn PDF document text
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/gibudowuluzugemokanixamu.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/vuwapexuniv.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/17724845169.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/vipotu.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1ccc0175b---36983449175.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/93016707113.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/8566739403.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/43378949208.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/boritovanedil.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/27240509955.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/vamuba.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/47500773883.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/pinewimetizeragus.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/kebozuvidebe.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/fexuxij.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1613d58f77db3c---45455491725.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/kewol.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/84216672205.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210916065053.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1632295136.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16131ac52ce093---93915611468.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.