Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6e4d0e7a6dd26f…

MALICIOUS

PDF

115.2 KB Created: 2021-09-04 15:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 11835d9dc29f82b4d5e06ce7e0048761 SHA-1: 31f36ca1cb530d036278f3ec8c8a1d0a2a3c8323 SHA-256: 4c6e4d0e7a6dd26fa5d5cb94f596221debbaec7ef1c1ed2f623e8ad401ce8214
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple unknown URLs on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6176

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://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095778a85062---49648642222.pdf In PDF document text
    • https://clubelsendero.com/img_pag/file/62994716969.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/busufomifutebizovu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd644f38f04---wenumewazakasunigiwom.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/32471426704.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/931ee7eca76639b6530b7d81fd123eaf/40871485951.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/ts8p9kvd20v968d7s7ldoo1hv2/zokalefekirixubomeberi.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a926402a86b---75831218264.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/1adeb9ea7a62337e0240b6f5157a3d5d/94191890980.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/41070294904.pdfIn PDF document text
    • https://webmenuplus.com/images/file/33252053391.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/87849291781.pdfIn PDF document text
    • http://zlato-stribro-investice.com/upload/files/98788745690.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/18b3898511e5c181cdb7469445ee97d4/rivaba.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16103bbd7dca0d---pefaro.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f92b2b1295c---99804359757.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16096fd55d2b10---1881493600.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/nefejazixiv.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1611b343a946ff---zozarakagoxotorudel.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/59414660239.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/23296368194.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/gkra3apge8vvmmfcleqpbca9g1/tedezatakusufaxafaxe.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/dqmkgusmgbrae5ctoue717cchc/98885276799.pdfIn PDF document text
    • http://tfforming.ru/d/files/72131179312.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/nupelesirizitiwefugubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=manual+de+uso+impresora+epson+l395PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18839 19544 bytes
SHA-256: f9e4c18ebe3f8f1865feeda3810d38bc1c41a5f6dc5ba230c3c88f29afdeb02d