Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea3a09fcc8f2b29…

MALICIOUS

PDF

62.7 KB Created: 2021-06-23 05:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 54e93feed13e6ee1761d0aba8726d836 SHA-1: 3c4501151dcc3360b3a68cb3e7f3b0f4a2d10241 SHA-256: cea3a09fcc8f2b297e5cd9d1db9b3d09bc07a9e305b483e9bb5c888d2181225b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to create a deceptive link farm. ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature, likely serving as a phishing lure or a downloader for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://pixomot.ru/uplcv?utm_term=pdf+to+xlsx+converter PDF link annotation
    • https://heyratacademy.ir/file/todelemazaboxawa.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fc0360ddef4376c05682f3f8da31706f/pefapitujeno.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/43214428302.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/961089d8e48c8d8805d41657af896540/35836747946.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/61839fff421c6392cee047dfb93257a5/56565765514.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aeb789080---gidufefadofofara.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/zurilokusaguvudifulikubek.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160960c397017f---momoneweburog.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/iovlubcddra29m1d4rcripiqri/41822328437.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160940d1d41c25---42125657167.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/9c746e7c98817b5469ef58e6c8b30fd9/18785032008.pdfIn PDF document text
    • https://vestol.bg/files/file/vinujepesipa.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/prr1vhmnbhdtctr8nqhiotddsq/84290675231.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608af872ba2f0---21243742629.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/ditezanidupujerajeduguk.pdfIn PDF document text
    • http://greenbrier101.com/userimages/noluje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B0 4936 bytes
SHA-256: cde63e1f3eaf22a13acf7b6d019749ce8ecf7a360e43c67885b0981f1bd1e36f

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