Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c42d0966c96574f…

MALICIOUS

PDF

61.0 KB Created: 2021-06-08 05:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9189b4927beea62b34581ae39796dbb3 SHA-1: 40775ea1b4d99cecf8ed38a0c97911b9297e91bd SHA-256: 7c42d0966c96574fa4376f01c1cb94715ff00758c253b45209adbf10aacc633e
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve to redirect users to phishing pages or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8798

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
  • 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://cructi.ru/uplcv?utm_term=poem+barolong+seboni+pdf PDF link annotation
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/8e9209eeac20ac37d1d571ec35d3259c/23246137034.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/rafadaguxix.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6200cc8504---95734863826.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbaf98c78dc---35219743681.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/54298841456.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/94204818079.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/ea2ef780d6720deb0be050d74350341e/29249126092.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d568c291ba---larikukep.pdfIn PDF document text
    • https://ivanamihic.com//files/28103915195.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/pufopunumisasefa.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/1dee4a397bad91d251b5f1d244b95b38/pubafitagiraxasemamivuk.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/61285585456.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/0015cc81f3dc426c853d46dd8a92ea5b/4704616015.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084483fa9225---jojisivumalanexodo.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/36906776767.pdfIn PDF document text

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