Malicious PDF — malware analysis report

Static analysis result for SHA-256 76481dc163257b64…

MALICIOUS

PDF

181.8 KB Created: 2023-03-21 16:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 5.15.4) First seen: 2026-06-27
MD5: 109f50a4642d0423c4462d49a55ae5bf SHA-1: 0d1cebc017614a7c601f3f2fddc235e814d67d66 SHA-256: 76481dc163257b64172a9003993d41c2543055227d60f56386d03f0ce970618c
106 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0749

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
  • 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://wejikurixil.oalroax.com/123n?utm_term=dividing+polynomials+by+monomials+worksheet PDF link annotation
    • http://www.bitstream.comIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28C44 13996 bytes
SHA-256: cad69adfaa6f8b9ef95c7aa51bcb9509b88551a8512c6873d6dbc628028804ca
font_01_sfnt_off0002b0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B0DE 10804 bytes
SHA-256: 317e2ce9facb8585f35ac65f519a928f44a193673f331c9367ba278d806ddc3a

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