Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c03c0effcffafd…

MALICIOUS

PDF

45.6 KB Created: 2021-09-22 16:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2de54fb2070e6974d23125dbba1ae222 SHA-1: e0fdb88572fc6c6d15067eb6476f0b43be6db67c SHA-256: a5c03c0effcffafdbfdd0963700306c251a85372cc6a7df5994cb67afabde874
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to a link farm, indicating a likely phishing or SEO manipulation scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, identifying it as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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 http://xn--oy2b19v1mb1yi.com/userfiles/file/fadiromixugovo.pdf In PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/selalujibuvemapegedejan.pdfIn PDF document text
    • http://mps-india.com/userfiles/files/29995420682.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/nebetudakak.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/petekem.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/89296093450.pdfIn PDF document text
    • http://opt-russtd.ru/data_center/upload_pictures/file/46721322212.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/99830710670.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109220710532886.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/misatutojupelewofawo.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/gabuxavagesapafufid.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/rigugozusoputuxezageviwi.pdfIn PDF document text
    • http://evola.it/userfiles/files/risevilisafekate.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/93758268148.pdfIn PDF document text
    • http://ombs.ru/uploads/files/54350215168.pdfIn PDF document text
    • https://kenkochaya.com/user_data/ckfinder/files/mosuximo.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/11128651867.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/majunuzilonemowoxuxibis.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141ec351726c---vinevebijum.pdfIn PDF document text
    • http://rongqichem.com/upload/files/ginadulewuvitotek.pdfIn PDF document text
    • http://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/40114650095.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161453fd06704d---todeborex.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/3819291430.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/14654345196.pdfIn PDF document text
    • https://invision.buzyhub.com/files/34008731472.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=snow+biome+seed+xbox+onePDF link annotation