Malicious PDF — malware analysis report

Static analysis result for SHA-256 2103c90cb8512684…

MALICIOUS

PDF

43.1 KB Created: 2020-11-07 18:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ad6c2b23be5ec3b1cc80197d438822c3 SHA-1: 78ae13330b76f5c3ae8b4e2c4d3b4062bbd0befa SHA-256: 2103c90cb8512684d94bfaa01896f5954cc2775cb0adc78f298669d0d0a2a86a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=msn+games+zone+free+game PDF link annotation
    • https://disaxugotusineg.weebly.com/uploads/1/3/1/8/131871710/xadasifezim_tidakudazexo_pafaz.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/483b82995d.pdfIn PDF document text
    • https://gozajajemitala.weebly.com/uploads/1/3/4/3/134325553/wosemesezuris.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_5f9a6684c5110.pdfIn PDF document text
    • https://kufofena.weebly.com/uploads/1/3/4/5/134504524/fupivisafofus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5f8d8c41dadb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5f90cd6806446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8709d55c3e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pulagip.files.wordpress.com/2020/11/injective_and_surjective_functions_p.pdfIn PDF document text
    • https://rujakozin.files.wordpress.com/2020/11/sao_integral_factor_item_guide.pdfIn PDF document text
    • https://kawofemat.files.wordpress.com/2020/11/witubugak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7dba0a-a7e3-4a1c-b59f-15e05a1ce7dd/11059972410.pdfIn PDF document text
    • https://pafegum.files.wordpress.com/2020/11/xumakosokidazok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c06a69-861f-440b-9669-d57723d0305e/likerivunijono.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_off0000686b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686B 5108 bytes
SHA-256: dbbe1410e436c46fccf6ba94cc06c02497c8d40a62dad588ca88d1a1e13f7a36
font_01_sfnt_off000079ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79CE 11116 bytes
SHA-256: 173fee3d9715a95a992845979286f2f1e0a965c4511351e539ac6aac964ed399