Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b92fbac1115bcc…

MALICIOUS

PDF

76.2 KB Created: 2022-04-22 18:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: ef5459311c7f9ac2752e2479d88dc55a SHA-1: 11089e66cd0a5638310198eb82ad6778bf729d9b SHA-256: 88b92fbac1115bccc90a3cae47c6ca588a77b7077d644d93d26e159f2b481287
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://norin.co.za/YmrXLWy8?keyword=how%20do%20you%20calculate%20atomic%20mass%20number PDF link annotation
    • http://kozelsk-adm.ru/files/uploads/files/devefemi.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/164471456.pdfIn PDF document text
    • https://kotata-zlin.cz/obr/clanky/file/sowetilagafij.pdfIn PDF document text
    • http://bluebossa.pl/files/file/167342136.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/bagasajav.pdfIn PDF document text
    • http://ardennes.proximeo.com/ckfinder/userfiles/files/mereliwefawikejarav.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/162147b405f233---8072696434.pdfIn PDF document text
    • http://tomrerjm.server2.dk/userfiles/file/mefuz.pdfIn PDF document text
    • http://kaav.org/kcfinder/upload/files/nenodazoxefelobadimigupi.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/19067040485.pdfIn PDF document text
    • https://4dapi.glg228.info/app/webroot/uploads/files/fufudepilo.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/muvunexolukibonixakenoj.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/43920446382.pdfIn PDF document text
    • https://eventaipei.com/upload/files/fopowofefude.pdfIn PDF document text
    • http://suachuamaydemtien.biz/userfiles/file/xufuladifemadokujad.pdfIn PDF document text
    • http://cyklokomfort.cz/files/kcupload/files/24010985710.pdfIn PDF document text
    • http://umpn.pnl.ac.id/asset/kcfinder/upload/files/33366652212.pdfIn PDF document text
    • https://swiz.eu/files/editor/kuditepatosojobipodesuz.pdfIn PDF document text
    • https://interangkorcondominium.com/userfiles/file/fujome.pdfIn PDF document text
    • https://doradca-bankowy.pl/files/files/80556610427.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/52615968548.pdfIn PDF document text
    • 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 extracted file (font_00_sfnt_off0000c4ce.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c4ce.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CE 17024 bytes
SHA-256: 0caf24a2af21f0ac9207884b58a0f599c442bed7a7b6d1ecf6962ea281b4dd97
font_01_sfnt_off0000f169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF169 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 10960 bytes
SHA-256: b03e67720daee57bfb642cfa3859a354085995a18c74094165d985b6fb2c20b5