Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed39c5487d8d673d…

MALICIOUS

PDF

63.7 KB Created: 2021-06-15 13:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 429a0d5ddb6ae428243edafa0fe5d6cf SHA-1: bc056e2ad84418b11d60c2dc8d0a72ad82e2039a SHA-256: ed39c5487d8d673d41ca7553b3df5465aa169d13720e59f45707d2cc1bc67a2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to a phishing or trojan delivery scheme. The document body's reference to 'mini military hacker' and the presence of external URLs point towards a lure to entice users to click on potentially malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7653

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://medvor.ru/uplcv?utm_term=mini+military+hacker PDF link annotation
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/c9f3e028c9df968c7203e02127e84cf3/83793601717.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/b57da1553df0e1063288fa8b74d5335d/wuzafudekasavopunudugijet.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9262951a2a---91541429984.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/jk3ea0tq98udke9t4mlld9acnh/zesadudideve.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160965b8b57e87---losiluluvutumuzopidaru.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607dda51b451f---97898426353.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/xiwixubufaleronuwuk.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/wikijop.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/c0c9b0433d3d5aed8012c8967ab0d049/44217802707.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/sukalaxerivazibi.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/52e2b44dc37b5284ebde296721671f78/34071175835.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b510e65d9e2---bujizezuxixarav.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/da9c1d2592bb073767ff43a71c418faf/76442785697.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/f61568e71f22c97b0d18933ff8509ec7/93205841320.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160841decb2fb5---28648403918.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16091303681b3f---48259465358.pdfIn PDF document text

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