Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa839b282d20ae65…

MALICIOUS

PDF

74.1 KB Created: 2021-11-06 23:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: f68b092c65b87b2ed2ad9e980b13d858 SHA-1: 695ecd046434767e0caf1d68b0250a91b68c5e73 SHA-256: aa839b282d20ae6561684a8899e1f7ac615d12d2b60358801215a522ab510d09
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://equinox-e.com/upload/files/wogivawafoki.pdf In PDF document text
    • http://rutka.pl/media/upload/files/b4e41f789aea2e141106c5ce6143c1b6.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/e030eaa05a7c19614b2ca98181b02fa0/kogapojapilazob.pdfIn PDF document text
    • http://kisito.com/userfiles/file/82411811867.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/89060153798.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/sedupitofonovutetodimolut.pdfIn PDF document text
    • https://bunianco.com/other_files/File/62755589025.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/tinujeweluzilizilubi.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/vagovagedero.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/25479159958.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/jowubuvijenidofubi.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/38506328376.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/46797565007.pdfIn PDF document text
    • https://flour.co.uk/ckfinder/userfiles/files/navizamukatusaveki.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/8315477426170349342409.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/47336395127.pdfIn PDF document text
    • http://surtek.biz/image/files/20150430_112823.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/nuferuxezadatuguwuvu.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/gujunadowozu.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/gerimuvalijevexu.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/joxifaf.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/xavowewisexaxupefosuw.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/TxADE9PCSUw/uplcv?utm_term=can+i+go+with+youPDF 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_off0000bd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0B 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_01_sfnt_off0000d431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 10272 bytes
SHA-256: 3446550eb80f114034db30218a84f6bfcfd82b9540a0705b800f3a6a9902cc37
font_02_sfnt_off0000eb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 18568 bytes
SHA-256: f7ad3284589d22289a3f67efe706e5b5d8620bdb7079fc70189f2039da9507ee

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