Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a18367df47e0cd8…

MALICIOUS

PDF

54.3 KB Created: 2021-06-09 11:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 83e79bc42d6bf227c29a24c7246ef59a SHA-1: d72ed2f487df99014e220fefe4bae8438b05b35c SHA-256: 3a18367df47e0cd80caee67b0d3bb049a1236749584967423d5b73d58b6c326d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, some of which are hosted on compromised CMS platforms and utilize UTM parameters, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing lure designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6125

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://coretry.ru/uplcv?utm_term=juicy+music+downloader PDF link annotation
    • http://orgue-chantepie.info/FCKeditor/upload/file/livanogedodavimopijo.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/46449836704.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/97378398902.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/vuvutifeduwimol.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6b8281a6.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/6348d57a812342d1370158f584ffc023/tagawaferitefavabugi.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/66811556123.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/89321839225.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/gunepakalipan.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a3dc16ed477---gajanogu.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/xetal.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d178c5242f5a2618c2c1231c3cb2c691/4016365454.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/nevapituwesawoji.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a52495ff6f---66494276186.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983439dd10c---depapulakemanurur.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/mexenigitus.pdfIn PDF document text

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