Malicious PDF — malware analysis report

Static analysis result for SHA-256 7250f1a05cb4a0fb…

MALICIOUS

PDF

165.9 KB Created: 2021-09-07 00:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e75536f6ed53f9086e114563608c254 SHA-1: ac651ed97a8f8b4556a8867867a4d35874faf47a SHA-256: 7250f1a05cb4a0fb6f6f4043996e8e6ee749ed9452f57580383c5934e7ec7a03
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics suggest an attempt to trick users into visiting these sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7748

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/uplcv?utm_term=manual+de+convivencia+yermo+y+parres PDF link annotation
    • https://amursvoidom.ru/media/files/waxoxez.pdfIn PDF document text
    • http://premiercontainerlines.com/media/ftp/file/rifowamaxumufijajipop.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ae0093bcb---lapoxumozizodi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab594e3769a---92685484376.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/geposelu.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c7363eb31f8---40252272501.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/639109642b865e929f87a7463cc69940/savitapitubuniri.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607383204402c---25055576340.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/67416598630.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/24440794513.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210623043018713.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/ade278959c140e214afe8488fb5af00f/vilesirerumumelu.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/7ebadc257b91523232361da7a5fa2231/25107868171.pdfIn PDF document text

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