Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b0e2a2f86f939a…

MALICIOUS

PDF

44.5 KB Created: 2021-09-16 07:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 31b87c6602032efa2dc191660473b167 SHA-1: 140059083097970e9f5408083beff1b77058f2c2 SHA-256: b5b0e2a2f86f939a4119cfeeca33ba32a2667ed4952054dc238483cf28eff611
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gestioniarmatoriali.it/xuxevegifavavelati.pdf In PDF document text
    • http://cariboohose.com/userfiles/file/zalilagogujexadodi.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/16545470917.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/67734946574.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/86362466096.pdfIn PDF document text
    • http://aqcorth.specialty-match.com/upload/files/91579297591.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161418890eea0b---23641729550.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///23019976097.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/72f15b22ffcfef6f06449e79b5c8f00e/2715462927.pdfIn PDF document text
    • http://gespk.com/userfiles/file/bifubitakofesazis.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/xuxajinixigezivozilodeje.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/vojawalati.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/52147902041.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba19718703---65226553971.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/jajopaje.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/pesiperajoreruguda.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/mekizoburorumex.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/tatozavu.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/wajenato.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/64873155519.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/50392471871.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/javekebomobogazipi.pdfIn PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/18103372292.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109130458515562.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=365+days+book+pdf+free+downloadPDF link annotation

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