Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd72d25afed9f626…

MALICIOUS

PDF

70.5 KB Created: 2020-11-11 06:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: caae6fef77117eacca490c3c85b4b115 SHA-1: 5ea0530b8f5af65bddb89f30c634bfa4360783d0 SHA-256: cd72d25afed9f6266cb1570f543460cbe9a7a543058f21303b4c30119f207377
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/wb?keyword=usernames%20for%20roblox%20with%20robux In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_5f9ce4bc9d675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f86f44097ded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f8ae8b8c6320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8703908155f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_5fa76a8d84186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5f9e83ba9eb97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413126/normal_5f9a15c25d59f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5fa4679b39ba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414847/normal_5faa77e04a43b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/napisakaluja/71972277060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022b96d9-a043-4057-b706-3cc08e68dd01/stative_verbs_exercises_advanced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3414eca-d012-4dca-be95-53748211a1df/greenpoint_mortgage_servicing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA23 5180 bytes
SHA-256: e7d264d42f5ed9355194c9b674ed0ccb6191fcf8baae0aa94416dc7a038feb84
font_01_sfnt_off0000dba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA7 10280 bytes
SHA-256: f6f42571936cfc38b0e2bfdd7a015129aae5458fd2075e19839dde6a083bce74
font_02_sfnt_off0000fee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3