Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a5857a99fe8128…

MALICIOUS

PDF

75.0 KB Created: 2021-06-23 14:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1c50cde7e0d516b2958945e836d73ccd SHA-1: 8c458fa615d8dd44fdd8aa43731b973aab841eb6 SHA-256: 06a5857a99fe812866a83295e768a96e7b1ee3a590b40d887aa91f46e98e8e75
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8745

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://medvor.ru/uplcv?utm_term=barakhadi+chart+image PDF link annotation
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160732c2d439cb---99210426203.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757c70deb86---67002626272.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6bcd0kqfikssqkf4c4algvj401/51155433722.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/oee99etreqqddbm9f2mjo3jcna/69247734687.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/40786dd8f47f47421d04bc9dd824f60d/xipumisofa.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607da65393522---tewux.pdfIn PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/24744185081.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9c46a2578---luteravede.pdfIn PDF document text
    • https://marigabung.com/contents//files/duboxejebajuwepi.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf5a169d898---gusebetigebow.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160932aec37055---pazexujo.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af70f28ce5c---49117340201.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/62157717004.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160982a7110ece---vokiwadipekose.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/e5d547191ff8f698a298b6d27f603b62/51172345790.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/2816026916.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD665 5256 bytes
SHA-256: b3d200c2a81758d9e55c9173d1cd2870d36d90d44bb497d433f94a7bff9032c9
font_01_sfnt_off0000e819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE819 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 11504 bytes
SHA-256: 4b4f7d272a26b45cccadcb4beda44a451a46cee32cb3796f5f8724a7c999f3d9

Open this report in the interactive analyzer, or submit your own file for analysis.