Malicious PDF — malware analysis report

Static analysis result for SHA-256 37587fe53e87f69c…

MALICIOUS

PDF

58.0 KB Created: 2021-09-09 07:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 23a2669e497982a7df3d6b043af3cfb7 SHA-1: 7c7efacc5a566a24ec71eee042b36101835cb1d5 SHA-256: 37587fe53e87f69cf048d8ce51f48cb54e3e39b03d5da6e01b8c9084d0def3a7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7666

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://archism.ru/uplcv?utm_term=chat+one+india PDF link annotation
    • http://pytextiles.com/userfiles/file/60477842326.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/48156081214.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/36576813798.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/batixigakax.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16135cb7b1c045---rerasajomu.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/26006779827.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/36085874368.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/60654878979.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/72160232523.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/dolev.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/pixawazafogove.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/wumawenoketixojero.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/zisonetiz.pdfIn PDF document text
    • http://perfect-aerosol.eu/userfiles/file/javezezamudawuj.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37885319320.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/xiwiduwesoge.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/18356380595.pdfIn PDF document text
    • http://newcityhk.com/userfiles/41984168906.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/21449385103.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/78177866464.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/32589766729.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/17429340124.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/38761732347.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/33948004392.pdfIn PDF document text