Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef9ca37d97c94a0…

MALICIOUS

PDF

36.5 KB Created: 2021-06-01 06:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ca0f6d4de7182dc26bf9e0008d62b2a3 SHA-1: 0b397a9cf13c6465aa51187b3861be4111593967 SHA-256: 4ef9ca37d97c94a0a9cc59ca9c266b0bcf1423e5f5d31062ab2ddf2ca76a471d
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and a single clickable action. The embedded URL, https://krisoc.ru/uplcv?utm_term=getting+nerdy+llc+evolution+mutation+nation+answer+key, is the primary indicator of malicious intent, likely serving as a redirect to a phishing page or a malware download. ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6152

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 36 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://krisoc.ru/uplcv?utm_term=getting+nerdy+llc+evolution+mutation+nation+answer+key PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1b064f52b---39181379620.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/mofibuk.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e3e9de7ff---91408967377.pdfIn PDF document text

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