Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ae55229194684d…

MALICIOUS

PDF

65.0 KB Created: 2021-06-17 09:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aa2debeec8f637a685b0a55238b1f171 SHA-1: 28011d16ed5005f31cf015e99652a33516edb98f SHA-256: d9ae55229194684d64719a17631cae26cfc5cfc8cee93cabd041b5d72fcf99a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a 'transformer schematic symbol'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7581

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://archism.ru/uplcv?utm_term=transformer+schematic+symbol PDF link annotation
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f32cd2ba2f---kiwivaxerolelowevuve.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a33e823aaf8---67663996147.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/texarubone.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/7434672329.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/46181392997.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/fb6995925aefb78911bebf87d8a269d6/99178628745.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee7324d80a---73710771616.pdfIn PDF document text
    • http://gtshotel.it/images/file/11492806678.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd1b43001e---91974697854.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8ff050b81---32663861073.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3b90906c684f23cc3be3d217593779f0/xegojorinesowurig.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/22858646304.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdf5f0728a---48330642461.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/sakimiledofofi.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd9d742516---kumodujimapo.pdfIn PDF document text

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