Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f117ed2e706c751…

MALICIOUS

PDF

41.4 KB Created: 2021-09-12 19:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: af666ec1253ec0fb7f97604c0aaf3356 SHA-1: e510781f7a1fd526e9960d93e92ccd421631eb65 SHA-256: 6f117ed2e706c751b64424a3d2bc2d4623fecc02d46659f53ef0f9b443544474
152 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious sites. The 'Image-only document with action trigger' heuristic strongly suggests a phishing lure, where a visual element hides a clickable link. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a downloader or redirector for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=simple+future+tense+worksheets+with+answers PDF link annotation
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/kadowako.pdfIn PDF document text
    • http://recviem.ru/img/upload/17391515410.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/58731232084.pdfIn PDF document text
    • https://umartravel.com/files/sawopudebijedatixaso.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/53720202836.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/16867958895.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/buregixukuwulozodivigepof.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/30949394308.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/zusinarageduta.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/79840468331.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/sojaw.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/lukodukopukusesuwuf.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/49654290144.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613de3c9da950---72801511969.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/545a5a362db477d34a7ba916ee58f0ef/dokenim.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/97239689370.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///80062636572.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/fatanujuj.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/53518445419.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/sitirumadijop.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/muxejazotupatunix.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/luvesidofifakana.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/wixul.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/15253476959.pdfIn PDF document text