Malicious PDF — malware analysis report

Static analysis result for SHA-256 41819532f7e265c3…

MALICIOUS

PDF

37.6 KB Created: 2021-09-20 07:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46a58881bb0aff48820d5dc6d765ba32 SHA-1: 91a4e5489d053838a5d29b29c66d8539fc55287f SHA-256: 41819532f7e265c3619f268aa2bf3c756dd9ec5f4235f6f8c8fe6767b8883589
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing or malware distribution. It contains numerous embedded URLs pointing to PDF files hosted on various domains, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a dropper or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7966

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
  • 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.
  • 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.
  • 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://baatco.com/ckfinder/userfiles/files/fafuv.pdf
    • http://aihyang.com/userfiles/file/57841080291.pdf
    • https://rpaxis.net/userfiles/file/lemizivofe.pdf
    • https://mhreng.com/userfiles/file/87824524764.pdf
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/8756639077.pdf
    • http://urbanelect.com/userfiles/file/runuwarujitejamupubububev.pdf
    • http://absolutelyneon.com/userfiles/file/xubagakogasutowabojet.pdf
    • http://altadirezione-consulting.it/userfiles/files/towizabowovagobakot.pdf
    • http://osingenieria.com/images/admin/file/bepixegolo.pdf
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/132050385408.pdf
    • http://airelimpio.mx/img/edi
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=gtyct+game+apk

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