Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1136fadadd80f5…

MALICIOUS

PDF

52.5 KB Created: 2021-06-20 21:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d6f9d06503e4c24caa5f8b41ccc3c6c8 SHA-1: eef50dc357b02016233e19a219c2b7b563e30d82 SHA-256: fb1136fadadd80f5090000754d20fd1e597331ae84afd3cdc81b3ce510360550
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, with several URLs hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body is heavily obfuscated and contains metadata rather than user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7151

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://karthikeyanjayaram.com/userfiles/file/solamifixaxubov.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b8527747b---32848901566.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94045b313a---91278900884.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/nawebefibowuderigegomaj.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/3898198488.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/tukufekedojolajesi.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/n8er4rdq0pfe6cjund3j1k0ss4/suminoxuzutuwawubuzazuv.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072468ce5b76---13938258722.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/vh0preeof8kbkps556g6vqfgt4/wuxek.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/ab64c55cc54339679fb0414c41070e1a/xitulesemojugubifi.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/d0738ae13acc830960e67dc7fd14765a/54941690523.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/vomilidosopek.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5b73d7526---deziwafalopegutevo.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/60046856479.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210606123459151.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=dragon+ball+z+shin+budokai+4PDF link annotation

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