Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e51889e6af66aa…

MALICIOUS

PDF

66.0 KB Created: 2021-01-02 22:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 6b40333c0df80d5ccbe591bff43bfc77 SHA-1: a5c77c49aac45c64590ec0fdafc62754ce640757 SHA-256: d3e51889e6af66aab0f80ac469051dad018ac0f0b327ab1d9b5d5daa0e5ff040
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://traffking.ru/123?utm_term=ad+prima+charter+school+uniforms In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_5faa211fbaab8.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/5d188.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/soxesefeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_5f8e6c9b35a29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5fcb65d3e1cda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takeju/coleman_powermate_jump_starter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/loratefofaperika.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/race_the_sun_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/puestos_de_trabajo_en_un_hotel_lista.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908d2396-db6b-4c7c-93ad-dc0c7751f408/archon_thanatos_skin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07aa521-f5a6-489b-a8a9-5c2784c6c5c2/90831565105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9f030c-bbb3-419c-b207-c3fc570a582a/47832192053.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_off0000c796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC796 5384 bytes
SHA-256: bfb9bae38a44370d642dc0a542e2c49300bae2db82952d4abd184c94c41c8f28
font_01_sfnt_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 9832 bytes
SHA-256: cf0db3c396b1e88374811b8bccc62db4897a53f2392ecf46666dabf5c0c63c5a

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