Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e6a7e34a91a1f3…

MALICIOUS

PDF

69.8 KB Created: 2020-11-10 10:05:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1891dcbccd02ecbd141ec84274d0dfcc SHA-1: 277acd0454f7c75500bfec0cc1146e4b22185a99 SHA-256: 28e6a7e34a91a1f3a11899a76b116a17eeb3ae8e99d703b33dc26d0085e5bd83
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?keyword=imperialism+cartoons+and+their+meanings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409413/normal_5f9faae01406b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f8c38991bd90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a7d7bf-6df0-4ab6-b600-29a37b833d14/55674011190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e755481d-8622-4dce-9761-926f16d46fdb/50513982995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd22487-2001-4640-9b8b-d60e17b998c8/fomeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20be9e84-30fe-414d-b72b-62770e833306/93003270600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689108d9-388b-4f1f-9272-d16acffef974/big_time_rush_lyrics_intro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6144c0f6-2c51-4c64-9451-25c83d9acb57/98090738661.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/zenet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2325043a-fdbb-48ca-8aba-674fbc6b5752/janafetokezewefonapodub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9258dd60-9184-495e-830e-13816fc386d5/vimurusubamagajesimet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ae3813-87ff-4b72-b135-ca5b2edc2130/munozevivepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2183342f-4309-4caa-b1b5-adda9b8acf36/93937456066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9a87ab-4e43-4a4a-9b15-6a2031c39838/wosoxux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518bafc4-851d-41c1-9a41-76b07e0b237b/wibufejosuxoki.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_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 5424 bytes
SHA-256: 98aa56167af02fb35ef8bcf201be73ffd4632eb8887d5d3fbec870c69700e427
font_01_sfnt_off0000e69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69B 10392 bytes
SHA-256: 47358cf1171abf72eddd004faf15c0e96aa26ceda977299e4b976bf9e5a7cd25