Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fdbcc3440d013b…

MALICIOUS

PDF

39.9 KB Created: 2020-10-05 04:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 031f9291aef0a4e70d1f95826eebf80a SHA-1: 945b1ac09dc140287a8e63a2bf20627a8373745b SHA-256: 75fdbcc3440d013b3ef20a12ebaed8287a0afdb4c61396128c8fbf415f732441
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=orthodox+study+bible+pdf In PDF document text
    • http://files.cqengineeringandmarine.com/uploads/1/3/1/8/131856802/5458865.pdfIn PDF document text
    • http://zivegafip.longedgepress.com/uploads/1/3/0/7/130776021/732e5feb1.pdfIn PDF document text
    • http://files.southavenzetas1920.org/uploads/1/3/1/3/131384229/zaxumawadebogubazona.pdfIn PDF document text
    • http://jimex.paintedtreasuresdenver.com/uploads/1/3/0/9/130969461/jimow_tonupidofu.pdfIn PDF document text
    • https://site-1043704.mozfiles.com/files/1043704/8723340502.pdfIn PDF document text
    • https://site-1038590.mozfiles.com/files/1038590/lidurukawapizalumatira.pdfIn PDF document text
    • https://site-1044019.mozfiles.com/files/1044019/dofubowerojuw.pdfIn PDF document text
    • https://site-1039778.mozfiles.com/files/1039778/31258133962.pdfIn PDF document text
    • https://site-1038600.mozfiles.com/files/1038600/zejatutatexilunaxuwasok.pdfIn PDF document text
    • https://site-1039830.mozfiles.com/files/1039830/wadenokiwutidosiduv.pdfIn PDF document text
    • https://site-1037837.mozfiles.com/files/1037837/27512449032.pdfIn PDF document text
    • https://site-1039728.mozfiles.com/files/1039728/18837878314.pdfIn PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/92721765586.pdfIn PDF document text
    • https://site-1039201.mozfiles.com/files/1039201/datokuzoru.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/1/0432/8810/1030/files/tarrant_county_courts_at_law_online_records.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_off00005e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E83 5256 bytes
SHA-256: 64f8dcf841f0d8667a88f58ea0a27b24320bbc3ae6f56fdcb39ae6f40b0b59f1
font_01_sfnt_off00007060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7060 10192 bytes
SHA-256: 27712c09a017451f1fb9c17210d39bc971a68728f3956837a1887ec95f7b850f

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