Malicious PDF — malware analysis report

Static analysis result for SHA-256 634c6421550d3d39…

MALICIOUS

PDF

333.7 KB Created: 2022-03-15 10:06:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-29
MD5: 4de0a400aefd63efe2dd2196783538c0 SHA-1: edfbfd6cfda1ac4cd9e7b3dde6dcdaafa139a11d SHA-256: 634c6421550d3d39e25bb943ff8912954aaa783760db1a1a978ff6c285b82cb6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6812

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
  • 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 https://tevav.co.za/XSRYdR1H?utm_term=normas+de+auditoria+independiente+pdf PDF link annotation
    • http://nordicwalkingturak.hu/_user/file/17317656257.pdfIn PDF document text
    • https://thomsonindia.com/userfiles/files/xonivikirojowirarujetufi.pdfIn PDF document text
    • http://contua.org/userfiles/file/47384068090.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/tukotipidijuxababegivof.pdfIn PDF document text
    • https://vajdasaraegyesulet.hu/kcfinder/upload/files/53280337582.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/92210934008.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/33096270006.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/72483476598.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/nebojugazutelab.pdfIn PDF document text
    • http://cadex.biz/app/webroot/kcfinder/upload/files/9795678096.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/lokudurarofeg.pdfIn PDF document text
    • https://megashina24.ru/files/files/51355513705.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/39122219445.pdfIn PDF document text
    • http://centrodebridge.pt/ckeditor/kcfinder/upload/files/zofusaxobovetisi.pdfIn PDF document text
    • http://hidramaco.com/files/files/14132085991.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/tufewogovuwomanumo.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/jurumijekaximuworepexidil.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/wamevus.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/gikirotufof.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/96943355777.pdfIn PDF document text
    • http://diveblubari.it/custom/archivio/files/juroloxe.pdfIn PDF document text
    • http://ty-universe.com/image/files/20220313_184520.pdfIn PDF document text
    • http://coffeexclusive.co.uk/kcfinder/upload/files/93402372386.pdfIn PDF document text
    • http://1088.net.vn/userfiles/file/18280247243.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1622c72bdf2f5f---virobuvije.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_off0004c0bd.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004c0bd.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004c0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0BD 10692 bytes
SHA-256: 1e1b3b3d8bb1c3947c867d65c940359cfe295816f2cc0bbbfe942d5f92eb5a17
font_01_sfnt_off0004d93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D93A 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0004f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F055 21044 bytes
SHA-256: ad680a9616067b2ae5e7c4b88b92922c63ce9a72598f3bd470084b572ce62f5a