Malicious PDF — malware analysis report

Static analysis result for SHA-256 4789080e77f52f2a…

MALICIOUS

PDF

78.1 KB Created: 2020-12-24 23:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: feb8e1b3c2ac82c3734744f105839a7b SHA-1: ef643f57f107750d71e2506290d566dc25a6c83c SHA-256: 4789080e77f52f2ad37efc45825a14838d5aaecdc4e15a5e01f0676d611e6e9e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=pre-teaching+vocabulary+math+avoidance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fd61e630ef04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5fb7b94383dd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mutirexa/art_border_clipart_free.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/60624918974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66db0d84-720c-4e40-b1d3-4cf740236cc5/puwonosopirof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84d16ea-34b8-4254-acba-8fb58dcf46d7/39953962925.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/juxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/vuzotexenuvalikumikoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/dynamics_365_business_central_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980e213f-e4cb-438d-af30-9ec41171215e/grim_dawn_item_list.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/kamen_rider_den_o_momotaros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8822ed32-b04b-4c9d-8ecb-f251ddf53633/56614262710.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/concord_grape_growing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/motos.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/mozilla_firefox_offline_terbaru_gratis.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 5512 bytes
SHA-256: 258c76ca790649590850d5536d07bcc4b5a2928efd059773423c01bebbfa8c5a
font_01_sfnt_off000108ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EE 10136 bytes
SHA-256: f963b6b52766e50de69601e774f5a9591466d3b46b45f7d7c623f768e5aed647