Malicious PDF — malware analysis report

Static analysis result for SHA-256 87940a0f52e0a313…

MALICIOUS

PDF

208.1 KB Created: 2023-05-30 00:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 5.15.8) First seen: 2026-06-10
MD5: ace843c84ca714edc0de11e5ab4bde82 SHA-1: 3acb6dd3e81b79df2ec08ddb44810fec5f2848bd SHA-256: 87940a0f52e0a3136a440c029fb55765a30a2b86ed759a2891a450275942b8cc
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5324

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://malegezu.loheb.co.za/gdy?utm_term=chicka+chicka+boom+boom+printable+book+pdf PDF link annotation
    • https://img1.wsimg.com/blobby/go/d37a9b24-bc42-4cb1-ab3b-3d1b21b01aec/downloads/valiji.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/671d8571-de15-47bb-8cd8-b624751dbe0e/downloads/lalasumoxipodeweza.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/3ccd9234-721c-480b-91a1-84bae34c2069/downloads/jokigajetefosefipara.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/d37a9b24-bc42-4cb1-ab3b-3d1b21b01aec/downloads/dufajepexodoso.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F11F 10968 bytes
SHA-256: 94255d203da6c10836373335c0902f3846233aa3660672f972f7f17ec6a1b154
font_01_sfnt_off00030a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A31 16368 bytes
SHA-256: c421599e11704f4129761ef4df8ad67ee942cf16fcc1e2746a93984263e91ea3

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