Malicious PDF — malware analysis report

Static analysis result for SHA-256 be396fbd84aacb49…

MALICIOUS

PDF

158.3 KB Created: 2021-09-21 17:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4e4f395bb77605bd7701391580cd6a32 SHA-1: 3b2fa6439f7a7f22d613dc019e9457738188ccea SHA-256: be396fbd84aacb49805e41436dd16c7167a77d45c141f81fd31213394da3741a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The sample also exhibits characteristics of a link farm, with numerous external URLs pointing to potentially malicious content. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8032

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://friend5190.xyz/js/ckfinder/userfiles/files/sowexiwesiratelajatu.pdf In PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/p2vkh7r8389vrsii2fev0oq48a/fapeboritusokov.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/nepalazifobipojoxeroguw.pdfIn PDF document text
    • https://theptaynam.vn/upload/files/budebovizugeguze.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/menujagozojilugavobil.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/30789397212.pdfIn PDF document text
    • https://fong-cai.com/upload/files/74450473462.pdfIn PDF document text
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/20118404887.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210905012813.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/17387415172.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/61239874648.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613904b498af7---69373521648.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/wudebuteranigajogati.pdfIn PDF document text
    • http://josquin-capella.de/download/puwudaxatonalesexunax.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/52198325409.pdfIn PDF document text
    • https://cingenito.ca/upload/editor/file/wejawurobuxusipa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=andy+murray+gfPDF link annotation

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