Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0fedb612cc688f…

MALICIOUS

PDF

52.3 KB Created: 2020-10-01 11:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dbeac3844bbe706b9120e7d318c6249a SHA-1: f068ed14fd5f754caa0b2a1a4bf0f146105f2966 SHA-256: af0fedb612cc688f76658309ea0eb79e0ae561a64240dfc4c46b267ec3812ee7
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=adulting+101+book+pdf In PDF document text
    • http://files.novelsf.com/uploads/1/3/1/4/131483550/mataxopawowojuvuba.pdfIn PDF document text
    • http://files.artinthevillage.co.uk/uploads/1/3/1/4/131453527/luburifeluro.pdfIn PDF document text
    • http://files.precisioncamerarepairs.com/uploads/1/3/2/8/132815123/wuwojozuxiba.pdfIn PDF document text
    • http://files.myleshopper.com/uploads/1/3/0/7/130739678/2642670.pdfIn PDF document text
    • http://files.rachelbrodie.net/uploads/1/3/1/0/131070212/muvobinasuvarin-zukoragexujim-fejeg-tujos.pdfIn PDF document text
    • https://site-1038733.mozfiles.com/files/1038733/39158854863.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/kazamevopodobizilovezirus.pdfIn PDF document text
    • https://site-1038592.mozfiles.com/files/1038592/depixefakojidajitofu.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/57aba67a-fe8f-4df1-a86a-b93dc5b7ecc4/60636080530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a57ab40-757f-4607-abef-b8d0a354f497/19315806552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff095ad-7f81-447c-b4d5-91b836f153b0/71844521529.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_off00009019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9019 5112 bytes
SHA-256: 227ae95c0f6bca8df0c4fb6de13252bd4ad99ab0e4589ec3c202ae10f36e45a6
font_01_sfnt_off0000a19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA19F 10440 bytes
SHA-256: 4738bd317335227fb925f65c75bf12f23c88ed1eb1645dd39ff4df0bff7f50dc