Malicious PDF — malware analysis report

Static analysis result for SHA-256 476f8bdc28f736a1…

MALICIOUS

PDF

62.6 KB Created: 2021-05-01 06:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3afdc460e05dcf35e71ead30898eb9df SHA-1: 084e0fc13f8ef04c6fe48e7d6646110dee6d289d SHA-256: 476f8bdc28f736a1f2ee9168eaef30a6baed6b367c10eac2341001ae8fe47319
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to host and distribute malicious content. While no scripts were directly extracted, the presence of numerous external links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607638281e0ee---15060607596.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dba9c7b09---fikoduwonegapaxo.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/465b903044a044c43cbdbf094892b08d/wolotusag.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/79mpk5dh4urqlb90qqffmegd70/nenosupivunon.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/4ap978hii22uiihv9b05lrplu2/xexetarumudukejerevoxul.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/75700a1d966bfe6a362c43955ddd54b8/4782454167.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749c1181729---80342815538.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d88ee2f93---xovebipoxedu.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083338825a53---82540036336.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/67874346698.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/b6199mc7v1257ekph429g0f6bk/22473995965.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608931b48fc12---61641798222.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608738c3d58e9---88300798527.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca26289bcc---suxuxemulab.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af4ee76e6e---17362970641.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/eibalvej8e6hlb8ravjpedbsgt/widirimelaramifodisijekog.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/b3a87c3e08eef1968837e29318864b9d/budilezafagi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=auditor+general%2527+s+report+2016+zambia
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df56.bin
3a5275bb73ba73184991e068c49dafeeda8e21500f0d91da4126eef8bb91ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF56 5972 bytes

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