Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bdd8bc0150fbaf2…

MALICIOUS

PDF

58.2 KB Created: 2021-09-11 02:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: af65a099c04c7c8a020585f6691d1730 SHA-1: f8e631919a23c48fa0c38de2199167d7e63015dd SHA-256: 3bdd8bc0150fbaf2cfe05d2f37731d2ac9e8cd1cf2bc963abdf44cc97313aec7
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The ML classifier flagged the PDF as malicious, and the heuristic analysis identified it as a link farm on disposable hosting. The presence of these characteristics suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7666

Heuristics 3

  • 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://cructi.ru/uplcv?utm_term=memo+for+android PDF link annotation
    • http://creaorganization.com/depo/sayfaresim/file/32448771307.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/lugikoninuxubawitusape.pdfIn PDF document text
    • https://togeltop.net/contents/files/14951954332.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/28356534955.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/bofuse.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/guwanenurobofaxujepud.pdfIn PDF document text
    • http://grasslandtj.com/upload/files/5285268913.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132810e32b29---kanesifexajan.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/55357213256.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/refejom.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/22082323133.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/wenasupezavitesifumesoro.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/togijuviratizigiwor.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/5f6b7c0e3789006abb85cf4741ed192a/vofoduz.pdfIn PDF document text
    • http://zenkatsu.dk/files/39808634307.pdfIn PDF document text
    • https://5udua.com/contents/files/6948724674.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/92223815913.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/29777967351.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210910095314032.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/duwugelokav.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/nuravotaliseruwitunatodul.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/nijemajofifidaxol.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/11101503933.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/fodoxekiv.pdfIn PDF document text