Malicious PDF — malware analysis report

Static analysis result for SHA-256 587b907167aa591e…

MALICIOUS

PDF

38.0 KB Created: 2021-03-27 20:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e09d635aa68c81a7d7ebd520305fa38a SHA-1: 4a749d71efe36eba90bc02dcb006eedb52954a17 SHA-256: 587b907167aa591ee7667b5f5d5e08eb3078fa9a286374b5d68c534a6462bef4
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is detected as malicious by ClamAV and an ML classifier. It employs a common phishing lure technique, presenting an image-only document with a clickable action to redirect the user to an external URL. The embedded URL, https://crophysi.ru/award?keyword=ejercicios+abdomen+pdf, is suspicious and likely part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6833

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 38 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://crophysi.ru/award?keyword=ejercicios+abdomen+pdf
    • http://jadivaza.iblogger.org/65841612746.pdf
    • http://shoop-fr.ru/auditoria_de_sistemas_ejemplosohnm3.pdf
    • https://cdn.sqhk.co/fetumamuv/jg5o0gc/parakunuwu.pdf
    • https://cdn.sqhk.co/vosiwuli/eRggGzd/beamforming_antenna_tutorial.pdf
    • http://sushibara.net/used_snapper_riding_lawn_mower_for_sale60lv2.pdf
    • https://s3.amazonaws.com/pujinit/kuloveguxes.pdf
    • http://lidiwerefibe.rf.gd/samivegamojezo.pdf
    • https://s3.amazonaws.com/retobifulipo/32265522880.pdf
    • https://s3.amazonaws.com/lebejos/medicare_card_form_for_18_year_old.pdf

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