Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8de8a5c13e389a…

MALICIOUS

PDF

41.7 KB Created: 2020-10-20 05:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d55bd29915b3e984898e1fb31cf8b025 SHA-1: 610689b1a3de444c7db0c04d9371883570f29e63 SHA-256: 2d8de8a5c13e389a614090afb92191dc6245293e301b2e40fc36aa6884748f21
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://ttraff.com/123?keyword=possessive+nouns+worksheets+year+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f8decbd9818b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f88bd5b8ba87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f88d77862e2e.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/fakawefuwiperonofiwi.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/f78fe920d5b776d.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/1582369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f89324486d12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f87471dd4dd5.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/fc74d9089574.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/8342438.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/e5f733fb-fd4d-4dc9-b00a-9fe22a0f7c53/gejuloxijijikenugoleluka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef85b94-e1f3-43bc-9abb-5d950cd3a463/65869768303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a82989-ce8e-4725-b297-2cad4a4dd615/bulezaxexofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2307129e-eb29-41a9-b98f-7cacb27fd1de/dukevov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23acd1d5-fa17-4498-9143-5f736d667d16/jefaxojeserenazamibixaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded0a693-f515-404a-958e-911b23829391/63391427026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217b9e0e-7d72-43b9-b5b3-1509269aae66/rafagoxulomoselebimoxideg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de5e77cf-0a9d-46ee-9261-b315e0169cac/neonatal_and_pediatric_respiratory_care_a_patient_case_method.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_off00006418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 5192 bytes
SHA-256: aabb806ce2115cc0746c508883ee7da24968b27d0d3e98b993650dd4b5af1ad3
font_01_sfnt_off000075d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D5 10540 bytes
SHA-256: f34bc692884833cc9cf1b4428749ca90f354310150310a811213a48f374f8f18

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