Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e5a328055456e1…

MALICIOUS

PDF

63.6 KB Created: 2021-09-12 11:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f6880cda4001bb3f81e9db7080f74212 SHA-1: c70b97fb7115f5a7ca52b5cbf8a42a15d566aece SHA-256: f5e5a328055456e1d8c2af88f60550047dfb94776143a170f90f9c7470fa379b
124 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external domains, with a significant number of these links pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were extracted, the presence of multiple unknown URLs and the overall structure strongly suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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://alubiasdetolosa.com/files/galeria/files/xuwere.pdf In PDF document text
    • http://aerotherminsulation.com/userfiles/file/29548177374.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342f65972a3---78509379619.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/tolusesumipubumawowom.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210911215526.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/79326374246.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/pijadarija.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/83809239450.pdfIn PDF document text
    • http://agilesolutions.in/uploads/sobafexekutukomate.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/zateguxofunom.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/fusetizejabijolaxaf.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/pugamemovusen.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/12457959819.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/gutadi.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/gidonevowafo.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210905044847.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/63814103299.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/8585484779.pdfIn PDF document text
    • https://inks.bg/userfiles/file/zakoziwoguvaxosetaxeru.pdfIn PDF document text
    • http://vuason.vn/upload/files/70355546293.pdfIn PDF document text
    • http://net-marketing.hu/images/files/jikej.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/8063032943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=best+offline+gamesPDF link annotation