Malicious PDF — malware analysis report

Static analysis result for SHA-256 42554a7d1397dc41…

MALICIOUS

PDF

70.7 KB Created: 2021-09-15 18:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 87dac5ae05bcc1f0414c58533ed6b31b SHA-1: fc31538219671cd9dc203c09f9f9b51bf6460894 SHA-256: 42554a7d1397dc41e08c0ba91e5492934aa328c9f8956addb2b03814c668b682
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://infrive.ru/uplcv?utm_term=android+photo+size PDF link annotation
    • http://stavo-bazar.cz/userfiles/file/35499965727.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/14224406096.pdfIn PDF document text
    • http://trieuduong.com/images/Download/80996516124.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-09-09/064c0fd39846bd9a21075101ceec9f24.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/pipagovesalufapevapubetoj.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/bufadapuxuzigavik.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/nodofolam.pdfIn PDF document text
    • http://mutitar.com/user_img/files/nujoxemuz.pdfIn PDF document text
    • http://akiisushi.com/uploads/files/fodugija.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/paxitesamuwejitetovomar.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210902_4CA182B564AA824E.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/wizadatewowa.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/tonagir.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/31433029958.pdfIn PDF document text
    • https://ultralloy.net/upload/files/musibuve.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/zenetewezos.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9531c1142---39097457140.pdfIn PDF document text
    • https://majubesar.org/contents/files/xoxorabobizosedekideze.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/zafisipa.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/voliger.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/pajijugip.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/xewamepenasew.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/pomejojanubopudike.pdfIn PDF document text
    • http://dongbanja.com/userData/ebizro_board/file/gazanoxikomirinevegamame.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 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_off0000b71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB71B 15380 bytes
SHA-256: 9f88ed0dd42dfe0d2c89f6b597506d926e4639c0f4a8b5c3f52bb669a0004e11
font_01_sfnt_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 10324 bytes
SHA-256: 62c0f6e4701d03d1621af7b16cd9dfb0f0e8cff2d2289eef470c9124093aea08

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