Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c0c95410f191a5…

MALICIOUS

PDF

81.7 KB Created: 2021-08-24 23:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2c9e532f44ba572a5009c89f824bb7c7 SHA-1: 23868506d3618d5698921a53c11d03a38caca91a SHA-256: d4c0c95410f191a5744a847b5dc58c3bd9f80522d6a9eb3fd1f1f648cd98653f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external sites, many of which appear to be hosted on compromised CMS platforms or disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. The primary attack pattern involves luring users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8605

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://oniceh.ru/uplcv?utm_term=elliotts+cash+and+carry PDF link annotation
    • https://solelane.com/ckfinder/userfiles/files/widusujen.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/2miu42417gg7762159cinik8e1/77709237370.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/02054dd890976fe5ce95fbfa1ed4e19c/65221369586.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021081302423177.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/46372629026.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a475c7559d8---5505385398.pdfIn PDF document text
    • https://tavio.ru/files/file/19020902464.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/5c1826aa16f972ad4720b1149a27f628/jukonizowobugesek.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/sudilokazafodede.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/fc5c76e827122585001f66f0779494dc/navipazama.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099e6915b1e9---53677525008.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/tujoruwukesidavi.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/ee71pvgac05lkhqlu3u636bt5q/32022099690.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/b6c4ca443efe8be296652d3e5c855578/3589309519.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/d726e44e7734f39d84ec141438a7d65f/bivata.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/wizuxomafujegufini.pdfIn PDF document text
    • http://schs1968.com/clients/861610/File/gofunobu.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/87102005941.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/99204340509.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/gabulanusumetidetokurowi.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c3f9cc9ab---rodazirilutofa.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c18b339e49---xujametesotesapiminosas.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/tomusipabobole.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/d975ea6acb08d8eb5dcde2fe7a6559a6/11003983583.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 16756 bytes
SHA-256: 1bb3482e1af745068fd9c2eba5259437fc0b7dd1ebbdde8ee04b4c5a79c82fc5
font_01_sfnt_off00011a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13228 10432 bytes
SHA-256: a9c8dc311924cbc50146611971f0b5f19cc0ccfb06c4a091e60014136c61c87c