Malicious PDF — malware analysis report

Static analysis result for SHA-256 399b80955287ae62…

MALICIOUS

PDF

59.8 KB Created: 2021-09-18 01:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cb0047e9afe653c6b3615976e701da94 SHA-1: 88efac23366617fa64120026cb3ac5396c76dbdc SHA-256: 399b80955287ae62b36f05ca79f3e4058141b57e1b2ac7df6dedb816a2d37d62
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The PDF's structure and the presence of external URIs strongly suggest it is used as a lure to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7684

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://nomylo.ru/uplcv?utm_term=systemui+tuner+apk PDF link annotation
    • https://dodatnagarancija.com/userfiles/file/vudofidiperufej.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/94575354761.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/34306023533.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/59751353395.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/kasavom.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/13687309445.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/dilig.pdfIn PDF document text
    • http://dc-3ed4d7413bdb.prshots.de/uploads/userfiles/1630547542/files/59143089692.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/57537592244.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/podusulevunanuj.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/jorexa.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021091805071173499.pdfIn PDF document text
    • http://twtqedu.com/userData/ebizro_board/file/67061189423.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329c0e8225e---mixiraxoxifuxajed.pdfIn PDF document text
    • http://cke.hk/userfiles/99468242863.pdfIn PDF document text
    • http://salt17.com/userfiles/files/27819454481.pdfIn PDF document text
    • https://escritacontabilidade.net/fotos/news/file/babebukobuta.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/vometufe.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/91183830881.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/tudutibe.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/nifavu.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614507b0d7736---81484437048.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/bowupige.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/80341400348.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/wuzijipidisod.pdfIn PDF document text

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