Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ec4b31803225ae…

MALICIOUS

PDF

37.3 KB Created: 2021-10-04 06:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: ca4875b35566f6382c4c16aaef935110 SHA-1: d9462d825ab16a7d2267740008d1e9903c7839ad SHA-256: 55ec4b31803225ae6f660b9bf9d01188ed8efee55b6ae9bf86211b5eef26ba8e
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing an action trigger. ClamAV detection and ML classification further support its malicious nature. The embedded URLs, particularly those with unknown reputations, are likely destinations for further malicious activity, such as downloading a second-stage payload or redirecting to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5051

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 37 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 http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/rasikadokorasumi.pdf In PDF document text
    • http://zxpgw.com/userfiles/file/tefujugivimeni.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b31a33c705---tiluwofozubitovotugata.pIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=wbs+example+for+an+eventPDF link annotation

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