Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d31cb49e9c204c…

MALICIOUS

PDF

338.4 KB Created: 2022-01-21 21:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: a067b10fd74c99ae9c31f808aab53342 SHA-1: aa853c3e64f61a7ca06b579a3aa0c657d118f94d SHA-256: c5d31cb49e9c204cc451058be2a6f16d76388fefc627158df1c037713452278b
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7397

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://aptekainternetowa.net/_mdm_apteki/file/rewunatifuna.pdf In PDF document text
    • http://polenes.cl/userfiles/file/92853455662.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/20160334199.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/18628262814.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/90552360234.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/33659486776.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/40596560736.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/93776179519.pdfIn PDF document text
    • http://www.grifin.sk/files/80858359599.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/64598423690.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210918122816.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/sotububuzinujasesexuza.pdfIn PDF document text
    • https://fong-cai.com/upload/files/pakikojevolegijed.pdfIn PDF document text
    • https://ytovietnam.net/ckfinder/userfiles/files/novamelowexedinota.pdfIn PDF document text
    • https://cabinetscounters.com/ckfinder/userfiles/files/96553276520.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/takajufobadinobis.pdfIn PDF document text
    • http://kag.fr/userfiles/file/61432422343.pdfIn PDF document text
    • http://seritour.com/rsm/files/pekogizexexelaz.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614291df5e5eb---zajigawinifunakedagavod.pdfIn PDF document text
    • https://allianztc.ro/files/file/87301067436.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/zinadikabuzaveletutuna.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/sodalegekamedumuxuzelur.pdfIn PDF document text
    • https://nhomphuongnam.com/upload/files/29003754224.pdfIn PDF document text
    • http://forcedainik.com/dbros/public/ckeditor/kcfinder/upload/files/lokolatofid.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/sidesupilomikoseku.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20211209145533.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/12849201528.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/22538129293.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/sotisupo.pdfIn PDF document text
    • http://amcdach.ox.pl/userfiles/file/88130054078.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cb8b47ff8ac7862af9825939de3e2847/85203351626.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/TxADE9PCSUw/uplcv?utm_term=audition+online++freePDF 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_off0004d812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D812 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0004eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEB6 10096 bytes
SHA-256: 8ba87f04e60f14e861e76d3f1aef0f6b488b2005ca13583d9b54e06ab5436e26
font_02_sfnt_off0005054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5054B 24752 bytes
SHA-256: 8082c76e52b8d4cf380168a3c929daf4108e7c0184ea6696a3a6cf853510aa7d