Malicious PDF — malware analysis report

Static analysis result for SHA-256 314a3da1781b4a76…

MALICIOUS

PDF

47.5 KB Created: 2020-10-16 10:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7c6d5f6bdd7eeb3436160f6281a43ebc SHA-1: 30ec543904d4426e1023cbe3261ef91b365b4d72 SHA-256: 314a3da1781b4a7618db2c0a28c2fbbc16360488a26d27be7f573fca41d2274b
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://ggtraff.ru/123?keyword=android+tv+update+sony+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f87af836dec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8764d358826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5f8832e085cc4.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/721b1df73660f02.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/bupemigimamuvap.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/wadulami.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/demajawugijudo_narasobabuson.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/6316162.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/5079214.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/6ec135ec-8f29-406e-aff5-df74e56a275b/47933212535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b5a9fc-09ca-4636-840d-2f79053a9f9b/tegupadofazitevovagoliz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6292112b-a308-49d7-b5e8-1db0c650a28f/67753969682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a43b26-20ad-453e-8abf-44b51a84727f/wanupovixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cbb87b0-753b-495c-8e28-cfafb5291ce4/xisejubawimemidisezuraro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e380490-f7c9-45fc-b9d4-16d57a6c98ba/dozugora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f145bf-f374-4af0-a81d-e4fa9d02f3e2/69785476163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23797108-1efb-41f9-9d0a-49108149ed27/9353097296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df83a2f-77fa-41e3-b136-f105062dfbb7/47954567649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73129576-fcea-4da6-99dc-04d0ec76bd93/sevewizuvogirunajoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb1c207-6253-410d-8742-275b69417110/79826724548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19e35d24-8a75-449e-bff1-8f6353409541/31464981031.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_off00007b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B19 5344 bytes
SHA-256: c4e0178e5802fb3bd03753e850ca4ab8ca6e7533514ff5b4118a4dc8ac8ea517
font_01_sfnt_off00008d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5C 10392 bytes
SHA-256: 04fbe8f4a60b7f0dc6ab99199d87c32c54ca3e50c9dd3c8563d8577f8e05702b

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