Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4e54582e2324c3…

MALICIOUS

PDF

60.9 KB Created: 2021-07-08 07:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6cabdd8e4da66e64068aeddb7dd6c13e SHA-1: a226897a7fb535b181414428c2c39c68a9e6e98e SHA-256: 2a4e54582e2324c32552d1c4c450938c36cbd9b96f915235f2a7895a686a5367
154 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains, likely intended to lure users into downloading malicious content or submitting sensitive information. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6988

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://krisoc.ru/uplcv?utm_term=download+football+manager+mobile+2020 PDF link annotation
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/4a9a0a72a8e49459de6f1fbfc2b40449/bugumexodatijigumagisapek.pdfIn PDF document text
    • http://jump360.co/upload/files/20210610044613.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/deacae36d75abe33264d9e5104429d1f/zitubebobilinerufanupupa.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/84054503981.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/iggdbj305mgr83diqar771p5q6/14002426561.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5c5c7f21b---21414524876.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/l3dbeeqpgifelomdplh4cl9373/88208077482.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/45891172094.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/bf414a503e56829e401dcdf3a86242b6/bonevabejejebudi.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/28419998794.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebe74ae898---labozuvir.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087e4b83edf3---gajabelig.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/wakegixibi.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/14500780326090e85d186c6.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160924f71e53a4---91807226403.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ee013dec2fe374ad043efe9cf6c76386/26667309981.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/709d36be00a5b7c1b272e2a9d1391986/90558908086.pdfIn PDF document text
    • http://stattus.com/assets/file/29233585294.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77857465180.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/1hvfafdljuo9gmoucq2kkihc73/jusilusegi.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/60655744170.pdfIn PDF document text

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