Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea51dcca94afd8c…

MALICIOUS

PDF

84.5 KB Created: 2021-05-22 23:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f8c7d23b2dc074f98f9acfd1fc4007f1 SHA-1: ba8ab0a63306cbbc11c6cee4648472530e7d1a1f SHA-256: bea51dcca94afd8cea3694f45bef372cf251519d69e36b5f5f7f14d10b9b6086
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8245

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://garglob.ru/uplcv?utm_term=does+lifeinvader+stock+ever+go+up PDF link annotation
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ca8b6d189d9fc5c5827191599913b93b/selufezuludirakebe.pdfIn PDF document text
    • http://firegallery.ru/img/upload/66852104868.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/18675538522.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/kibinakofevadikidaxun.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/5de20b9cd56e55aeeed4f3f3315244bc/lininewijerowapi.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b7d776f4de7e87a56452cfd7416699e3/rotogujararibitar.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/1a41122fe88daf11d7c6b2d0a4f87600/lubidutusuliz.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/nebo3oqp7hn0v7mhmlclqt3ea5/6608785927.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/35729657702.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160832b4e1be68---77701507623.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce2c495a6e---16176900293.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/80622669807.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/165euvrp4p3829kq2ahvur3gr6/sigiwodiwufeni.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/651b4686cb9cb12927b69e2a05ec8dd7/bivawid.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/cda15923aad4194b70ab9862f3e4de93/30407728933.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_off00013b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7A 5444 bytes
SHA-256: 7ec4bc405298c3f7d062e2583dc8fce04e08082124a5b79fa581e3e6112a4724

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