Malicious PDF — malware analysis report

Static analysis result for SHA-256 231927be7514ee5e…

MALICIOUS

PDF

43.4 KB Created: 2020-10-11 09:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d5134ac5c7d9c16afcec469e9128bece SHA-1: 90241b21dd187e151ea7ecb1a203c7d8c71c2bed SHA-256: 231927be7514ee5e5b76abadb59d6828aea9a1d3efb6ff01676d614501fa15d3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?keyword=superman+returns+game+pc In PDF document text
    • http://widim.madisonmedium.com/uploads/1/3/1/4/131408899/7749567.pdfIn PDF document text
    • http://mebogupes.coreopsisdesigns.com/uploads/1/3/0/9/130969204/jegite-muliwirigowe-narawageg-tadikefana.pdfIn PDF document text
    • http://josugemuz.plantbasedwithrobin.com/uploads/1/3/1/6/131636612/saturelolol.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/1/0491/9948/0998/files/pixaxavexesodafunigoxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/92237968980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8277/9291/files/simultaneous_equations_answers_maths_genie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/20109281055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4793/9996/files/that_time_i_got_reincarnated_as_a_slime_manga_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7e7ae8-447a-4b22-8bca-b89e06d32471/2427279995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8fa4d89-4e91-4406-8be8-407fd92a766c/52833106385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7529da3e-0cda-47e6-97b3-da0f7b2010a8/18035167507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/71658368720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9676/files/dresden_files_peace_talks_epub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8334/9657/files/61889307153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0714/7671/files/zoxizidimojul.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_off00006c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3D 5324 bytes
SHA-256: 2efb574ca6d10e4ae42c2570a9777b8f7e8fa7773d633a09844a1e49b7bee445
font_01_sfnt_off00007e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E38 10208 bytes
SHA-256: 63c607c22d2f2673b3b1af39c0215109c1feeffe28a51de98fb1865f1b3f8f51

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