Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a1e882fb930167…

MALICIOUS

PDF

61.0 KB Created: 2021-06-09 08:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9b0ddebbb03f1a22b7fd546da9f4b7c3 SHA-1: 6b5398e878fad3c9be16fa2d652876690f90874e SHA-256: d4a1e882fb930167ebfe7ae801c923750eeed43eeff008fe8e72c6f6b77d21d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The embedded URL 'https://pixomot.ru/uplcv?utm_term=control+circuit+of+star+delta+starter+with+timer' is likely used to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific intent beyond malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6659

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://pixomot.ru/uplcv?utm_term=control+circuit+of+star+delta+starter+with+timer PDF link annotation
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbfa76e71c---kexufipamuzamuvaderi.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0684151f5---19455479863.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/aacrekv4kqcj6ofa265fsjcv57/1413499763.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16073f8ada9ad7---86331820387.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a74bff81aec---gipenanavufemowef.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/39242315571.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/rhlu1nbshghd20dh8pufsk6ied/2724406140.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/3bs3asjpqas8u61k1q9unfepbm/guporoniveg.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/8oo8avic67elilkc4s460dpd11/wavegozarola.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/20aa761e1eb04275f1a5f907503dd490/9138106494.pdfIn PDF document text
    • http://proxima-design.cz/files/file/jufuneroko.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d2a20ae906cd4575b03632a66cfd4bf2/xupenanofo.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074aace1c913---35862157942.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa478d6e8d---79243688580.pdfIn PDF document text

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