Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd63cf1bf17e126…

MALICIOUS

PDF

70.5 KB Created: 2021-06-15 17:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 125cb0be4cce15f360c81e4a0a2df668 SHA-1: c1fb51ad7381487d476f7dfc79928d37f1c89993 SHA-256: 2bd63cf1bf17e1268295222dab17dcdf5787c9a07602105136116a6f98c558c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress installations. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user interactions, common in phishing or malicious redirection schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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=sentence+in+simple+future PDF link annotation
    • http://galluccifaibano.com/userfiles/file/danurowikugewixarituwimeb.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/wexopomezukuzofanamu.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fddb06702---zewinipivoto.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/987d4dd221639f44cbc11b79b7778a29/27953694368.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160b41e3aeba41---jegivofi.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/tawanenujixawuditejoxuf.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/33757f36cf05201f1de0a174a0f41226/82986927380.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/85438232639.pdfIn PDF document text
    • https://hgb.se/filer/file/tutiwakujo.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/xofomotagol.pdfIn PDF document text
    • https://migger.dk/userimages/file/50929070529.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/51421374423.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608428c282613---37765047899.pdfIn PDF document text

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