Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e00eef5db7743c…

MALICIOUS

PDF

40.6 KB Created: 2020-10-10 20:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 796d83c72503e56588d57f6c90879935 SHA-1: cae739bda0cfe542fe7ae94f93d064f4ed2b44ed SHA-256: c4e00eef5db7743cbc4b6a2cff867de1f7977d81fa6e90babfb519cd56e2f037
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=7+s%25C4%25B1n%25C4%25B1f+soru+bankas%25C4%25B1 In PDF document text
    • http://supup.lecheilety.com/uploads/1/3/0/7/130775085/4677111.pdfIn PDF document text
    • http://falilapam.lcassociation.org/uploads/1/3/1/3/131380828/8644696.pdfIn PDF document text
    • http://files.uneed2.org/uploads/1/3/0/7/130739697/900073.pdfIn PDF document text
    • http://files.kattulafamilyfarms.com/uploads/1/3/1/3/131379266/680da102.pdfIn PDF document text
    • http://fupuguja.perrysburgorchestras.org/uploads/1/3/1/4/131438563/nejutagovuza_pisavixi_jizoxa.pdfIn PDF document text
    • http://files.holosartsproject.com/uploads/1/3/0/8/130874391/zakasubebusoz-sesejulose.pdfIn PDF document text
    • http://defaj.this-be.com/uploads/1/3/0/9/130969114/7064331.pdfIn PDF document text
    • http://files.dotyhilldesigns.com/uploads/1/3/2/6/132696598/6926970.pdfIn PDF document text
    • http://files.sinkpong.pub/uploads/1/3/2/8/132815076/fopaz.pdfIn PDF document text
    • http://ridoruk.travelofadiasporicself.com/uploads/1/3/0/7/130739415/susujoziwusiref-wuvexudoj-gotele.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/6fef43b2-1a7e-45ab-8dd9-2dfc176ca796/wiwewenirirolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62148828-2f17-4f6f-b8a9-8054f470ec11/naxalopegogoteg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b9a5eb-de09-418c-b5e1-e0abbba0a817/baxamumiwiked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795de390-3cb0-413b-9078-8eb28dd7c460/70867075644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/46138370622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6666/6407/files/the_aims_of_argument_8th_edition_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/zemabu.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_off00005996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 4948 bytes
SHA-256: ecb18c9e2085b2cc46bb4aad50e50ca4b9ec6511de92900bad78a741d72ffe44
font_01_sfnt_off00006a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A81 13780 bytes
SHA-256: 0168215b5e3e289866087c18081aa1c870869b06d39175b0d1f578e740f271ba

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