Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54f9420d1200753…

MALICIOUS

PDF

47.8 KB Created: 2021-06-24 06:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: eb501b3d4bb6aa52303ea96f902c10a2 SHA-1: f03898397bcef2480386268fd9eb69e624bad5d3 SHA-256: c54f9420d1200753aae17137d23cb4e848a00f4d3dec89e0fccf9f0eb828aeb6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7104

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://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080136dc6c7f---legowuvulol.pdf In PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/v0sm78pq7sqo3rbum6c5pku3h7/femukiso.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/13e13aafa22217762d6ffa16a619889e/juvebo.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/daf39b407a2bedcb319eb5b387c84d77/rufopo.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210608162319461945.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/86268563377.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/434099fe725516e90b1bd0d2607a7af8/sijabejitilusu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/36beae4b308e11a4e61ffb7d0e9a7650/zexivakalugozepi.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/dopinepegatunerimojubun.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75af05c560---muropalewixodenizapepet.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/705986426.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849f574b861---87528269950.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/5p1e5ngtjqhsbgqd2dv1v63kj6/wilat.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/b0fe65e9339db6275fd0444f020553c9/fetatezofedit.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acaeafb8667---64536844007.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/zukozaseritobe.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a702f0693e2---45125789828.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6a499eb52e82c91916b2d8b5704413b1/forivibekigesewusetevip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=letzebuergesch+fir+all+dag+pdfPDF link annotation

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