Malicious PDF — malware analysis report

Static analysis result for SHA-256 4257d6bae691590f…

MALICIOUS

PDF

77.2 KB Created: 2021-11-16 03:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 165cdb557c76b41ace9df684828f7341 SHA-1: 5a96e836ac53234a91b14c27733be1cc8839fbd9 SHA-256: 4257d6bae691590f2930ee543dffd649f91ce982b5d699ffc43bdda75c6ea5e7
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://geometrarontani.it/userfiles/files/91716899638.pdf In PDF document text
    • http://xaydunglenguyen.vn/upload/files/769ece.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16187ec14d3fbb---90238819721.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/gapekegidawenibiwekolibes.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/59812655346.pdfIn PDF document text
    • https://aksusu.com/upload/files/sofazisomipuwakuvimo.pdfIn PDF document text
    • http://purel-biopharm.com/upload/files/8282474432.pdfIn PDF document text
    • https://bkairconditioner.cloud4demo.com/uploads/files/noxixirulogegepuf.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/tivenotebebusilosavu.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/51765854138.pdfIn PDF document text
    • https://crbz.ru/userfiles/file/senojage.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/24205607191.pdfIn PDF document text
    • https://carlock.hu/ckfinder/userfiles/files/65474555823.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/8d3vh5ebk2t3eqkmd4f29qefuu/6398123142.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/10/21/3677064601.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/jutatebusojarepawa.pdfIn PDF document text
    • https://uangraja.com/contents/files/rodowivajiwa.pdfIn PDF document text
    • https://steammining.com/userfiles/file/9647839225.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161706982b438f---69128005642.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/14734914392.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161516112e971d---katukalipekivevixuwukoxo.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/vimolawalotifokusodezug.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/29282807302.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb0e954269---52051533307.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/HKUGBsJGI0E/uplcv?utm_term=prier+in+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000bf2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2B 22632 bytes
SHA-256: 370458badefebfeef42a8893d5b2387dcc35779d82e995ce947aecd2441e7e86
font_01_sfnt_off0000fa2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2E 10008 bytes
SHA-256: 902aa09acaffc19b0bfbf13ccda0c4cbedf38166e6f58d4dd6de30475d156dce
font_02_sfnt_off0001102f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102F 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef