Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a0f6fc4d012a8d…

MALICIOUS

PDF

45.6 KB Created: 2020-10-30 21:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 50e231b1532bf9747a88116ed5164292 SHA-1: ce394395675531551d8dc334f39a486df1c0c752 SHA-256: 80a0f6fc4d012a8deec83238343f4fd4af82223edae66e78c469ac00b7627904
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=new+paltz+school+district+budget In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f903b031fc38.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/1/0505/0197/6226/files/vovuno.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/jimevevi.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/susquehanna_township_high_school_soccer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6ac72e-32bf-4b71-b7e6-64bd94cc2b9b/kejusakosuxamatobojogura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5783/files/30576386629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77e9d8f-70be-40c6-a753-d4956dfb8eb5/21762133933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c35a69-1df5-4572-ad11-48f6ee25d9cf/5158430753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252e8a4b-bd06-495b-a266-d5cfb09355a8/83360023715.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/161_spring_street_melbourne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aecb560-1d08-4452-834e-9b3461a2c346/78471947694.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/temario_auxiliar_administrativo_comunidad_de_madrid_2017.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_off000071c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 5588 bytes
SHA-256: ea78a111a43a46cb5c242ee4bd7d83456f2e0d83c11bff2d338095ac42290020
font_01_sfnt_off000084d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D1 10912 bytes
SHA-256: 14b3ad96ad2bd15b752687f466383d794f142d639ea3d04a18ae1f42a0a3a47f

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