Malicious PDF — malware analysis report

Static analysis result for SHA-256 4783ea50761d97bb…

MALICIOUS

PDF

65.4 KB Created: 2020-12-16 22:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 9ee2f8a894249748e93159e7803daf8b SHA-1: 9f3a4493867cbb66101feb7b8bb9979389f08436 SHA-256: 4783ea50761d97bb7b9d0ddcc043071cd3ba578e2041357a6a6204f92a2ff682
196 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
  • 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.
  • 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://trafftec.ru/123?utm_term=kc%2527s+driving+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489245/normal_5fd1470a3d12f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5f9ecb81192b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_5fb2a42d3cee9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_5fa3a47e30393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375351/normal_5fc947f4eb3da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5fc19dfb0eefc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_5f93fffa388cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489596/normal_5fcd0d4eaa587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_5fb41e067ff32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f9479662204c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f8ef1a7e8fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_5f9cdd8f107b1.pdfIn PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/xurenorame.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2640ad6-5593-487e-9f46-c9a0db214eff/asimov_guide_to_the_bible.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_off0000c5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A5 5052 bytes
SHA-256: ddee7e507b36964dd6bab319de8cdeef0f237dcafcb4bdb0cca2162978bb31d2
font_01_sfnt_off0000d6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 10068 bytes
SHA-256: 48494f900de37400dd524c598ec1826a8799e2521ca74fd6e1be9ce8e1e414af