Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5da4781e0a526c3…

MALICIOUS

PDF

76.9 KB Created: 2020-11-11 20:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: f5e81fe56b71375ec98c1646d3968f1d SHA-1: dde43f62fecb4fabc31c54917aae2ee0f65fe799 SHA-256: c5da4781e0a526c33ca064df0fbd4409ae77ddd902d51541bcededf489b98028
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=facebook%20%20video%20to%20mp4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_5f97b2f965870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5f90949a50fae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f8ca60c65f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5f920e8f44a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_5fa65045cbd59.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/lanubili/abraham_twerski_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/essential_university_physics_v.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4a796f-1ef3-4e0e-a2be-7998ce6d64a2/22721923288.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/89748576169.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/25846203216.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/the_tempest_william_shakespeare.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/575006091.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/16401372532.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/duo-therm_57915_622_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/vupetusufefumitobuwoxagod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d08fa85-c09a-49a5-90d6-da39957a2b12/janiz.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_off0000e392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 4904 bytes
SHA-256: 3630792f3fe0015b31414dbd350bc1042c41750c0b3d22eac6bb8a4016913ee1
font_01_sfnt_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 10628 bytes
SHA-256: f798f52c1c02d1fc30b7767a53d702c8fe7e555662d7f3641a8d262844d6e25b
font_02_sfnt_off000118b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B4 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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