Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4629eba6d8fd250…

MALICIOUS

PDF

40.4 KB Created: 2020-11-05 15:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1885fcdf78772e815568e88822301e60 SHA-1: 9e6a74844761aab4befee8fce603ec23238f2b57 SHA-256: b4629eba6d8fd250f8408dc22f3a1524f2d09abb9c1913fe1433be2298b1159e
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://trafffe.ru/123?keyword=the+walking+dead+vol+24 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8b813e203a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f93354d585d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_5fa217fa4e206.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/fosagoba/matsu_psx_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7513/4135/files/scribblenauts_free_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6450dcf7-774f-42c3-982d-4d4d7467c938/95239867526.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/personal_development_module.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eeca939-b443-4652-ac39-90fcfd98ecf9/driver_for_lexmark_x5650.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/common_american_idioms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0d89ce3-1923-4870-be4b-d9aaec5827fd/online_multiplayer_games_unblocked_at_school.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/zigefav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2638/1498/files/70026968802.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_off00005ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF0 5200 bytes
SHA-256: b63f6c7b9b4772897b7b23733cb6b5234775b6e1db45fd75b18aedabc6ea34fe
font_01_sfnt_off000071c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C1 10476 bytes
SHA-256: daf3f3ae45536925777343c3707985c829995d2016d78ab728f1b0a3bb77d65c