Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b921fe5419a9f0…

MALICIOUS

PDF

73.5 KB Created: 2022-04-04 15:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: bbaf9eac3085d9a2222d6e6a4c0efe20 SHA-1: 1cff24a69122bdac488b0c532725832273b6e464 SHA-256: a8b921fe5419a9f0417c0856799c5255b7b978b038ff89eed5dac49c73dcf36c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://dentalburgas.com/files/files/21499616207.pdf In PDF document text
    • http://www.nbaindia.nic.in/includes/ckeditor/plugins/kcfinder/upload/files/36320321014.pdfIn PDF document text
    • http://vodokanal-proh.ru/files/files/jozefumetudigadupeme.pdfIn PDF document text
    • http://redagowanieprac.net/Upload/file/bujagubebovapoxujowinix.pdfIn PDF document text
    • https://sepikiduluwad.weebly.com/uploads/1/3/4/4/134487701/xazazu.pdfIn PDF document text
    • https://truongdongkinh.phapluatvietnam.com/upload/ckupload/files/18619383417.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/jikux.pdfIn PDF document text
    • https://www.monacruises.com/html/scripts/ckeditor/kcfinder/upload/files/dixadugotava.pdfIn PDF document text
    • https://gorelafuxom.weebly.com/uploads/1/3/4/4/134497365/f1daf43d7b7.pdfIn PDF document text
    • https://xipixipoduk.weebly.com/uploads/1/3/7/5/137501676/wijomodilume.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/rikutepezemexibez.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/mogavavusobogojowavalorek.pdfIn PDF document text
    • https://nojonepidafajik.weebly.com/uploads/1/3/0/7/130775859/fikezolevato_vetom_migalim.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/taziremedodexuneg.pdfIn PDF document text
    • http://iuppitergroup.it/kcfinder/upload/files/tazuwerolubipanesu.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/57319180271.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/buzubetozijevibozanutude.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/gobeveliwamebeze.pdfIn PDF document text
    • https://gagasanriau.com/a450d92cb6be01b3b3669c18bfca7901/kcfinder/upload/files/lapiki.pdfIn PDF document text
    • https://dobivevoxopu.weebly.com/uploads/1/3/1/4/131453544/zuvatumurof_wavot_romamokiza.pdfIn PDF document text
    • https://nodemudikukurev.weebly.com/uploads/1/3/5/3/135348567/mezuj_xezanowubez.pdfIn PDF document text
    • https://sunuf.co.za/YmrXLWy8?keyword=how%20to%20put%20slope%20intercept%20formPDF link annotation
    • https://cicapersonel.com/upload/files/18613681808.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_off0000b886.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b886.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB886 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09D 10656 bytes
SHA-256: aeaa870dd4b43547ecbeec6fb55bc85fb3ed9ba04f23a3d39a1935ce24a6449d
font_02_sfnt_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 17408 bytes
SHA-256: 4188d49f0da86ababd665840af66971f34dd51f2af793765670c9345c1320acf