Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8731bbb27f75bf8…

MALICIOUS

PDF

74.1 KB Created: 2021-10-14 11:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-17
MD5: 8dd9c076efa68a063678a8ab934651a1 SHA-1: 547675daf3053bb24a3fae874a68da2b40df747a SHA-256: f8731bbb27f75bf8679649c17d848692af46b2079aa68e5c8be217dae4da3f83
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://akinmedical.com/uploads/file/kuxekip.pdf In PDF document text
    • http://www.mustwalge.ee/data/content/files/75378055986.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/gipelilazevogugupixoweku.pdfIn PDF document text
    • https://anvatsaigon.suzukihungyen.net/data/dulieu/files/45286303886.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210922160952.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/96134137825.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/56213731617.pdfIn PDF document text
    • https://asi-filter.pl/files/file/43867575185.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16162e9784ce76---buvanilokopupu.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/96005175328.pdfIn PDF document text
    • https://558com.vegner.com/userfiles/files/20210930_204337.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/35054299780.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/48743881658.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/52315810147.pdfIn PDF document text
    • http://zimmerei-possert.at/dudivesovesaf.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109282247467718.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/94910179023.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/tukevopikopuxakazuparu.pdfIn PDF document text
    • https://campermagazine.tv/public/file/88655788615.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/41651278731.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614272db6c6a8---41018896789.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/tozijofijinibuwaroxezoj.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/ruxerosokarumitop.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/BGAemAmcdTc/uplcv?utm_term=refrigeration+and+air+conditioning+stoecker+pdfPDF 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_off0000bcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D3 10884 bytes
SHA-256: baea4a4f76aca606ecceef8730aafe6f9f56fb05c587cd0e26f83798cac2d393
font_02_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 17240 bytes
SHA-256: ba101532fba25f9ae1ebddfff7665599e0d8da9ee6604133058e1b7dcff8261b

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