Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9957264df1b7a53…

MALICIOUS

PDF

78.9 KB Created: 2021-08-19 02:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6f43bc01c5c486faa5f4fbc848e347b8 SHA-1: 41ac98ce14143cae9c00b70d0d0d411846445ccf SHA-256: e9957264df1b7a53208d73717941775fd406d27a111e50de1cb9ec5b1c2a38a4
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, indicating it's likely a phishing or trojan delivery mechanism. It contains multiple embedded URLs pointing to compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content or download further payloads. The PDF structure and embedded links are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2972

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
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=solucionario+matem%C3%A1ticas+1+bachillerato+santillana+serie+resuelve+pdf PDF link annotation
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4bdf3a8f7---48757085654.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d74eda57122daedcd353210e37f4955a/zumugefolujinag.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/b435dc0fa9628c98a41093c540f4a875/lulolape.pdfIn PDF document text

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