Malicious PDF — malware analysis report

Static analysis result for SHA-256 a435a9edb78ca56f…

MALICIOUS

PDF

35.7 KB Created: 2020-11-05 19:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b944c3be228b5bf05ee6a15973dfb5fb SHA-1: 577b656d4108c086e04b3250adad3f91bd846a9b SHA-256: a435a9edb78ca56f9c7334052b99e038ced4255ef93f75aadee6cfb1af80b7bd
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=irwin+door+lock+installation+kit+lowe+s PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f8859d0b6cf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8b9604be6f9.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/zukukelejurotef/vutafonopadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b557469-b276-41b8-b95d-bebe29f08a8b/spongebob_games_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfef38f-4b08-43c8-a752-097e93a62fce/shiawassee_county_jail.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/1266966527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99105ff8-cf64-4c95-b86e-dd2923e73796/fobixalefexetugitobep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df112689-3f1f-42b9-b138-3b13265d6d7d/77187698227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e5e0f7-dbb3-45b6-86dc-49bdab848c18/pneumatic_symbols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef450c55-6107-4044-841c-de81fc136659/kufepafowojozapuwelamukem.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/umrah_guide_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fe6352-03a0-48cb-93f5-64716f55dd16/tibuza.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/op_art_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd7e762d-8260-4465-85c6-24bddb34f2ad/70997049311.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_off00004e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4F 5028 bytes
SHA-256: a834b1c61ef62ef98e052298f3bf9117b1d6d9ea5c1bf5978d4b01424287fa52
font_01_sfnt_off00005f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8B 10068 bytes
SHA-256: dd0fa0f3dcaafd168e18fb3e742ec447429e07aa84f56f1bee5deaaeee4a0277

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