Malicious PDF — malware analysis report

Static analysis result for SHA-256 179c6c95be667a0f…

MALICIOUS

PDF

48.8 KB Created: 2021-10-07 08:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 6c20120f24bfd3c5c850fc5f065961b7 SHA-1: 8ddabb791e6d3b17d557ae28271ebc834862a6c1 SHA-256: 179c6c95be667a0fb532b9b52f8e5230ce7f38903fd06294d2857c9f6722804f
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a tactic to distribute further malicious content or phish for credentials. No scripts were extracted, but the structure and heuristic firings strongly suggest a malicious link farm designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6948

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 https://medvor.ru/uplcv?utm_term=the+definition+of+verbal+communication PDF link annotation
    • http://microcement.ua/userfiles/file/tusivaxe.pdfIn PDF document text
    • http://armanetti.com/images/raruporena.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/kegozuxufosi.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/xizobizevexugigipajibifub.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/26771573440.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4668b550c---fomokaradalagom.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/64800227108.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/zilosovoxo.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bfbc2d124---nolife.pdfIn PDF document text
    • http://signauction.net/userfiles/file/wovugigafewolaranomupij.pdfIn PDF document text
    • http://zimmerei-possert.at/31427803322.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/f9f59a8db25950c15c7a7fa5c8a7d72b/sopudizenib.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/wifegoweduboniladigunu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/f5af74e720d25bb4170a36545ee44477/vupogikozo.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/bogufurarimoxewaj.pdfIn PDF document text

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