Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86d510e2b30e20d…

MALICIOUS

PDF

37.2 KB Created: 2021-09-29 04:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e504ba018dea21b54c094302e43065a4 SHA-1: eda9d7f2ab7daede36cb60c4b5a9e49d096a4b90 SHA-256: f86d510e2b30e20d5cb157b8bc63709e1f3a1f8395ccb3296d8dc6167bd97583
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF is identified as an image-only lure, typical for phishing or malware distribution. It contains multiple embedded URLs, suggesting it's part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6667

Heuristics 5

  • 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.
  • 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://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/987e01689baa568c3bd9469c2c0adfb7/gomixorazunipisi.pdf In PDF document text
    • https://laplacedesstores.com/upload/file/58311657922.pdfIn PDF document text
    • http://skisun.it/userfiles/files/12559065849.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/37747100314.pdfIn PDF document text
    • http://szcftz.com/upload/43239509051.pdfIn PDF document text
    • https://italvaping.com/file/faputaxejilekorokej.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/kipetodofosud.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/lujugetasaladurolokiraw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pic+repost+apkPDF link annotation

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