Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f6b9b5cbf2b946…

MALICIOUS

PDF

40.4 KB Created: 2020-11-08 04:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 306de094e193167e9637b2211071ba1c SHA-1: 00edd673ddd8b8ca6f498786b1a16a835b9d5bc5 SHA-256: c4f6b9b5cbf2b946576141296c7400d34e0a54102451e5fe086089b055d294f4
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://traffset.ru/123?keyword=wow+classic+addons+gathermate2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5f8d5f04bfa01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f9c2d9e327b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5fa72c669b33f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5fa20f1ca9494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_5fa74c2cb26c2.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/5a2168e4-e73a-45b1-a370-b578c1463d98/43247858934.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/updated_periodic_table_of_elements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f08e535-ed2f-4b79-ac2d-2aaff786ac6b/65824726030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c315f32-a917-4759-b0a3-69fd41c96757/nizomawuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad14b3f2-d3e5-4ab9-809b-925a27173f88/3414534773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6786bb7d-8940-4960-a139-2338bf7fb5d3/21235958670.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/35722352620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12013cca-03f5-4dac-9064-0a3aed6ee9f9/padudu.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/e_waste_management_seminar.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_off00005efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFC 5588 bytes
SHA-256: b20089a09aeeb9aec861af1234eb59ef28a027f2eabc34dfd9e213f878235bf1
font_01_sfnt_off000071ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EA 10340 bytes
SHA-256: 9b7f9b1cfda7a66d78a9141f0d7b0119da01b6f96e687b35002e030d4b9ea5de