Malicious PDF — malware analysis report

Static analysis result for SHA-256 1915101231c4501a…

MALICIOUS

PDF

63.0 KB Created: 2020-11-13 04:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-22
MD5: 9ece89c5432c8d9fb79775ec1a3bf21c SHA-1: 44206009c4698f1323bf0dda9e519087fdf84001 SHA-256: 1915101231c4501a85451b7221af428b43b04b36a5baeffb9472c7543d1ee666
254 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
  • 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://cctraff.ru/strik?utm_term=more+magic+and+mayhem In PDF document text
    • https://bufazori.weebly.com/uploads/1/3/4/3/134377245/21cbe4af1120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f9c90136feba.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_5f943eba82045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_5f905b42b162d.pdfIn PDF document text
    • https://subonotewus.weebly.com/uploads/1/3/4/3/134347286/disumobesokudimuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501383/normal_5fad41629f9fc.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/besafefaf/mcq_on_algae_and_fungi.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/sheltered_english_instruction_pros_and_cons.pdfIn PDF document text
    • https://s3.amazonaws.com/xedobox/49321391926.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/user_stories_applied_for_agile_software_development_free_download.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_off0000b9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E3 5252 bytes
SHA-256: c10b6bde4d08d9e971ffb387d3a00ff24021b0de173bc30bf091adcd62e01aee
font_01_sfnt_off0000cb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9E 10620 bytes
SHA-256: 72a860a3d1a9c107a76998121f703300f05914188f08f4f568f11072229b78f6