Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06f4e6cd2f20287…

MALICIOUS

PDF

61.6 KB Created: 2021-09-25 04:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bab456b168fbcb1e36b28f8fd4921242 SHA-1: 0942f0397199971dbd45a7d121f8b1e09b3d63f8 SHA-256: d06f4e6cd2f20287b0d0514339d75a1fbfba938fbef337f038f186774f3ec5ee
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress installations, suggesting a phishing or malware distribution campaign. The embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9675

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://oniceh.ru/uplcv?utm_term=top+open+source+software PDF link annotation
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/0755ae4b4ed58bd93b894e1357fcb26e/dolesunanutan.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/4d65d1419146aa38636355ca6c1ec741/lepak.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/22426149268.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d48c1778fd---gipix.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/torodozebamobogekepuged.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1614349d96587b---bomazegozoxuzi.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/vabuz.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/10692444354.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/21992061658.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/60551668576.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/vuzosepunixipewuzamadev.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/hnbh9o0ufoq3us83necg9muvgf/vupububuveganuludaparagel.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/47209554614.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/8aad89727e870cedd7aa5d07efa2efac/38345858367.pdfIn PDF document text
    • http://valentine.tutaylamhet.com/storage/ckfinder/files/70730953823.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132817e31743---56499084430.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e41a3c2277---fajajazixugego.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5e9788ade---wipazulipar.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/30702750911.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/puvuvumewiwifak.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/87997344023.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB425 18080 bytes
SHA-256: 157b648366eb3d6ab554ab3add9f886dbce530456aeb40abb1bca2e77255fe2c
font_01_sfnt_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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