Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9dce76e31cb36ed…

MALICIOUS

PDF

70.6 KB Created: 2021-09-26 08:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ef1d296869d8308eeabd839b2e506635 SHA-1: 6a008f24db4416e46cad14b1fcb36d4531b516f7 SHA-256: b9dce76e31cb36edd51f11a970d03424128e3a6574663e81016dcab16e7de40f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://allytemp.ru/uplcv?utm_term=tubidy+music+download+app+store+download PDF link annotation
    • https://binarbaidrealestate.com/public_html/userfiles/file/84335644063.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/tavukudufawoxigasedikizod.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/vabelukudixi.pdfIn PDF document text
    • http://cartopack.be/Images/file/34216730392.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/65042618132.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/87591894952.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/57766018014.pdfIn PDF document text
    • https://cmoretv.com/userfiles/27679938412.pdfIn PDF document text
    • http://linker-apps.com/files/vogepidazimunizafa.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/jufazutamiwiwoxo.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/wogofisi.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/mituzedusuromolewobu.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/72090364812.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/23844282184.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/1513181718.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/vebub.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/fugebo.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334323b7465---76422765516.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/busibepamuwojut.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210914143318.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/93225015143.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/walirirokatovurewiborigu.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/sidapiwaw.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_off0000b09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09C 15780 bytes
SHA-256: 44aca22371d5dee661fbe43401b8f9820b2f8c85360c977fb8863e090d303d1e
font_01_sfnt_off0000d902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD902 11080 bytes
SHA-256: feacfb8f2967bfb405e210a43502da09e78877722b883e26d6980535c4adf868
font_02_sfnt_off0000f2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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