Malicious PDF — malware analysis report

Static analysis result for SHA-256 4708c3976e026e88…

MALICIOUS

PDF

72.5 KB Created: 2021-09-13 14:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a122d0fb8dab7eb9e16183529286603c SHA-1: 81c8a1800357faa1ed3c3ca9bca71b174810052b SHA-256: 4708c3976e026e88f42a204b686e0ba07a59994edce069ffe3e79ac98a9aa742
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://autothudo.vn/upload/fck/file/sezefudi.pdf In PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/82466649740.pdfIn PDF document text
    • https://km2804.com/ckupload/files/birojogex.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/zuputurubovowolederilala.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/81967518817.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/fakimunizuvevi.pdfIn PDF document text
    • https://epiphanych.com/images/file/kumigixegapuxazomivet.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-7/20210907112330914486.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/38837169398.pdfIn PDF document text
    • http://articolo17.it/siti/usr/foto/files/53268482974.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb024c41d5---vazovinaxeno.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/koperurekovox.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/55898803315.pdfIn PDF document text
    • http://gojjang.com/uploads/files/lewopaxegenokula.pdfIn PDF document text
    • https://fabriziochessa.it/userfiles/file/jixijase.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/vimeginolokusumomux.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/jogevufevasupopejo.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/23728811351.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/80cf65a16aba70036cd3210b34d8855a/wemuz.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/jixoti.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/3224637657.pdfIn PDF document text
    • http://le383.com/uploads/files/66108600488.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/74670713457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=best+porn+game+mobilePDF 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_off0000b9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D0 16588 bytes
SHA-256: cada801a37271cba3b3241c783ecdd28e75376f462f5ae0bfaa262f0dfaadc9d
font_01_sfnt_off0000e475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE475 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8C 10788 bytes
SHA-256: f7057a167dfc9e40c1e64d0a4b64cc7db5327931b5c3406cb5bf87c6e294dfba

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