Malicious PDF — malware analysis report

Static analysis result for SHA-256 53eb03e69bce696b…

MALICIOUS

PDF

44.8 KB Created: 2020-10-14 17:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f230bf2091f02f4fb95dc68155f28ef0 SHA-1: f16338eaff2e51d921996e42f51af62ed3bbef00 SHA-256: 53eb03e69bce696bfa7f9d968654bcd45dc054a79ad6886f697262801305b1c8
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://gettraff.ru/pify?keyword=2020+hyundai+tucson+repair+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f870a1367e6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8706542431a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f87085b1619b.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://site-1048219.mozfiles.com/files/1048219/zarotarakegibekopu.pdfIn PDF document text
    • https://site-1036917.mozfiles.com/files/1036917/kiviratomipijuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f86f6fb9cc8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f86fea170fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f86fee450c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f870016362a3.pdfIn PDF document text
    • https://site-1036885.mozfiles.com/files/1036885/24683011564.pdfIn PDF document text
    • https://site-1039877.mozfiles.com/files/1039877/61585502100.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/32703bfd-8e48-4353-8536-296252d2c01c/vuselijelafirabesas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c618c5-117e-4d81-8f90-5b20fe90a0ca/gujejoriwelatuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6509c00-e946-4785-8104-b66a385bd074/vatolesuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9fea3d-43af-4934-9bc4-4e98b306313a/wapofagonitutovipelof.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_off00006f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F89 5676 bytes
SHA-256: fbbec5b2696c2ea1869bd4007dfdfd6de9db5c596f07262c6026853989bc0b51
font_01_sfnt_off000082a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A1 10296 bytes
SHA-256: 245ba33ce95e5cd72e655dd5cd6d460401130cb2b868d0aad308cb84a4ffe4f9

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