Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ba17425641d8cf…

MALICIOUS

PDF

40.4 KB Created: 2020-10-31 22:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ca92ae26ad3e780b65e9246149d83fcb SHA-1: 1acce2110772463dc2e4200cf30f9e292eb3564c SHA-256: e2ba17425641d8cfb5dfa85d13e08c5ba24f6453e874622f81362cd9d65f29e0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://cctraff.ru/pify?keyword=knights+and+kings In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/claude_lecouteux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/hr_block_quiz_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd61346-6cd3-4d69-af29-ce45373f8e22/megudabe.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/kitowipogejawabarav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4090/4612/files/dead_space_3_weapons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/stone_fox_activities_and_lesson_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/judazosamifepakaseju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2069/5742/files/nasarezafuzagepeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3218/8357/files/romance_sonambulo_analisis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9902/0187/files/philips_avent_2-in-1_electric_steam_steriliser_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9920fab-5407-4bc3-b019-3e9da8f5e537/16890937677.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_off0000628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 4992 bytes
SHA-256: cb76b97cec799f66feefa9060a338b29a706d3ae6f187b7f38c2b3a6efd1d38a
font_01_sfnt_off0000738a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x738A 9704 bytes
SHA-256: c51a8651e4cbebef16a4748d429008693ef038f62c47716cb3c0e578b48aad60