Malicious PDF — malware analysis report

Static analysis result for SHA-256 9487dad643364e93…

MALICIOUS

PDF

69.6 KB Created: 2021-09-28 18:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f7a80c99bcf7252affb186f296cf0528 SHA-1: af273676cbda864990834fdb6a883645bf4089f4 SHA-256: 9487dad643364e933e552b35f8817107e9f45b23c965588b758d408d21808229
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a likely phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. Although no scripts were extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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 https://toyotaautobody.com/ckfinder/userfiles/files/74895972747.pdf In PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/wironijeze.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/95753674621.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210926085943.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/25393508860.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/71240139775.pdfIn PDF document text
    • http://special-pharma.com/upload/files/gegitepem.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/82383493000.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/661332792.pdfIn PDF document text
    • http://pedraferro.com/files/files/kalarobafulokiwanar.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/39828189318.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424f5a6732b---48182550000.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/jusekovilujuxedetisow.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614c93a80ba0d---18767077865.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/dolanugilugabasimuru.pdfIn PDF document text
    • http://melabo.com/upload/files/somulerakofevegovale.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/pegifipakori.pdfIn PDF document text
    • https://onlinendttraining.net/files/63710323637.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16137adfcaedb4---juruzojotejajakezuxefub.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/60546329603.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/37802643662.pdfIn PDF document text
    • http://drprdesaihospital.com/uploads/xapinavesikiwe.pdfIn PDF document text
    • https://promise-land.com/upload/file/gusitetujosulijule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ios+best+calendarPDF 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_off0000b0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B7 15872 bytes
SHA-256: da358d25a7ae38fc396edca39c1b017145b89d1212fd589b47bf63e81d7db0bb
font_01_sfnt_off0000d903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 10364 bytes
SHA-256: 5d676b84eb5734fd01c9588f3afcbf617f967781ddddbfd7bf0823db3ec37570
font_02_sfnt_off0000f093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF093 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1