Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15094a89ab56e75…

MALICIOUS

PDF

37.3 KB Created: 2021-09-27 00:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d6623fb76ce880758adcad434f35e80d SHA-1: 3792a1f3d6f642926f94fa85081e28ab455717c7 SHA-256: b15094a89ab56e75e813c0305ad26c842ff234beb83b832e3adfd83560659cfe
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and a machine learning classifier. It employs an image-only lure, typical of phishing, with a single clickable action directing to an external URL. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not a typical user-facing document but rather a container for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9636

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 https://smidgel.ru/uplcv?utm_term=the+collected+works+of+mahatma+gandhi+pdf PDF link annotation
    • https://mbzgogo.xyz/web/img/podborky/files/zasaledodegub.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/dezajopebirajid.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/fejim.pdfIn PDF document text
    • http://hflchw.com/upload/file/60277402816.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/2cc0ec4d0df920d268632bb856bad8d7/65014550545.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210909050831933282k4vexp.pdfIn PDF document text
    • https://lsv-wittlage.de/ckfinder/userfiles/files/relodipasijufakixumip.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/83674708325.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/tubima.pdfIn PDF document text

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