Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe7a04ccc12a7b4…

MALICIOUS

PDF

70.7 KB Created: 2021-09-18 08:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 756702e277fd841af5b9a6c2f3d45862 SHA-1: 0ecc5d85b02897ab9ab39b1a419af4b0bbea4b2d SHA-256: cbe7a04ccc12a7b48973ccafbfdb1ca9def56834e0a4099737d32092efeff790
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to PDF files on various domains, suggesting a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination or spread malicious links across disposable hosting. While no scripts were explicitly extracted, the nature of the embedded URLs and the detection suggests a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5948

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://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/ropiruwexerevakupasadavax.pdf In PDF document text
    • http://kulturazebrak.cz/userfiles/122538441.pdfIn PDF document text
    • https://geniodelweb.com/file/19664018227.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/zepevodepavujonujepakasug.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/sirivorukidanokeritep.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/fafadapokekuvo.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/jusozija.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/71694366242.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/bikugonawuzor.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/kuliduvo.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/19928243475.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/patatikut.pdfIn PDF document text
    • http://hocomesun.com/upload/xuzusuwedeka.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/qfuimok4kolthnfi089a1e0st6/54511947554.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/nogowikadomedidarawele.pdfIn PDF document text
    • http://cbafjvn.com/uploads/userfiles/file/rozadazuvijijuresopakeku.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/nuwevuxujegepesudexa.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/biduse.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/61022788068.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/bitajokez.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/12715173737.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/72631626709.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/31bd6f189bf3e362148a1822dc905da2/24677915028.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109141448476613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=vedere+sky+go+su+tv+da+androidPDF link annotation

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