Malicious PDF — malware analysis report

Static analysis result for SHA-256 91059250c0ec4f28…

MALICIOUS

PDF

51.2 KB Created: 2021-09-07 09:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f22fcd22e663f72505282c483b7483f8 SHA-1: 54d99cb4310c0ff11f00a18ebc1e45e1f570aad1 SHA-256: 91059250c0ec4f28ab1fb6c0a61f28bcc34771ffdd101e4279fb2f0d0732b3bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating it contains malicious content. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress uploads and other domains, suggesting a phishing or malware distribution attempt. The presence of multiple links on potentially compromised or disposable hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7479

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 http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0ae29c5f93---24654512474.pdf In PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/jojoxir.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/nizoxup.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/64138377004.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/c25931e4eae4fc5cf13750071821ea0d/48621274822.pdfIn PDF document text
    • http://paliukenas.lt/i/File/girokigo.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160763768a60dc---xovoborilulixoxuronesuzuf.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0bd8ba3b1f48a7b8785faef482dc46eb/puvavuzasenuvafojezap.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/93ec4dce2681a32421ebb72604446223/nabixomavalowotuneruwade.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/fde43550db465fd45dfbf24228a81b5c/83907240726.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096852777029---vutobifore.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/92345068374.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=desire+of+ages+pdfPDF link annotation

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