Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16e9cf4ef379160…

MALICIOUS

PDF

77.6 KB Created: 2021-05-26 17:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f53d937bb84185d4a5a03afb68ab3119 SHA-1: bb1e16bcb428217c9b7d50510d3b1006525131f4 SHA-256: c16e9cf4ef3791604e2b364455dc87153ca172b512a5ce75ad211513c316638a
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8646

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://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/a7dbe1fe4f3738915a4fc70a96e092b4/41621694940.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/8e206d0cacdc810d69a00cf62ecb462f/volifi.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607606d8dc4ef---luvebojilab.pdf
    • https://securitydm.com/slicice/file/mosagi.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f51d261522c7b7dac94362a0d062be81/63005896013.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608797e841de4---53750154369.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d0c7eb02b---tuvibikifafesexawofi.pdf
    • http://adaviestransportltd.com/userfiles/file/jepiwiri.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16093046b614ce---nugoganad.pdf
    • http://omonetach.pl/foto/ilustracje/file/soxuranososepagofuwi.pdf
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/d95c5533dd2b4408e886066541c34eb6/kubebizuwusoroputus.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/2667f67f73f50c6c46047c5722b6240c/62538814367.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089ceb8e6c67---jafamureji.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094927214ce3---68945871568.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746169256ef---gobironopilezivez.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/6bb855b14f645534c3ea332e856ad5a3/pesoza.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=porque+guerra+fria

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