Malicious PDF — malware analysis report

Static analysis result for SHA-256 25feddb1246ce95b…

MALICIOUS

PDF

71.1 KB Created: 2020-12-24 04:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-03
MD5: 3a843058e34a03656cad0559bb73e9a1 SHA-1: 0bb85dd717e616013aff97cec13b664076d46179 SHA-256: 25feddb1246ce95ba239cdf7fddbe2f43bc9fc675fda7a8ac35ebf03b19154e9
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/wb?keyword=70%2080%2090%20music%20hits%20list In PDF document text
    • https://s3.amazonaws.com/xurixado/delegation_skills_for_leaders.pdfIn PDF document text
    • https://tedovuja.weebly.com/uploads/1/3/4/4/134465286/togemuvodululibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5fdc0312289ed.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/jekinu.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/consort_systematic_review_guidelines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f962adddf727.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/grandmaster_chess_3d_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_5fc259ef2fa44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5f90c08e0abeb.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/LnuKFie/paxemabaxaxofomowom.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000d998.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000d998.bin)
    • 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_off0000d998.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD998 5212 bytes
SHA-256: b3babb48ad35dd8ddd512a0ba89517bef1ac9516deb39a7ca0edfb859c5f3e47
font_01_sfnt_off0000eb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 10792 bytes
SHA-256: 07fa26c3c2e253870fac6b241fe4637b803449dca82ca75b0dd8947bd318a6f6