Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f0da94cb766a88…

MALICIOUS

PDF

68.7 KB Created: 2020-11-11 22:58:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: a4c54a065da086cfbca8301778e788da SHA-1: 71a58f2dda5517f2466fa56c7f93c9bfa17438de SHA-256: a4f0da94cb766a884356aded1c13ca2ca5585a100fc43ad9b71ddadcc6eb3d41
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/wb?keyword=shooting%20games%20offline%20apk PDF link annotation
    • https://lajojadarexod.weebly.com/uploads/1/3/4/5/134506383/5834857.pdfIn PDF document text
    • https://rimejosokodux.weebly.com/uploads/1/3/4/6/134691074/9093294.pdfIn PDF document text
    • https://zuxaminuxux.weebly.com/uploads/1/3/4/6/134652083/kegozekiwuro-jizegelufus-kijiludagin.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/vobusuvuzupabu_telobe_xivonamubaj.pdfIn PDF document text
    • https://tadadali.weebly.com/uploads/1/3/4/0/134095934/janisejeve.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/8dc8aaf8dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f94a2baec145.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000d083.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000d083.bin)
    • https://s3.amazonaws.com/divelatoxa/airline_feasibility_study_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/capitulaciones_matrimoniales_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/74432758881.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/heaven_is_for_real_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/vososixijejep.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/12078236597.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://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000d083.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD083 5384 bytes
SHA-256: 8c08ec31e05f200559797e0f278db754e7c34ef6de737e18a0cd79b8671f2359
font_01_sfnt_off0000e2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B9 10268 bytes
SHA-256: 4b003ed5700728dee31381cbfbf242445df9a26eea6d0ecc2849210be1d8d89d