Malicious PDF — malware analysis report

Static analysis result for SHA-256 16475e0f41060e34…

MALICIOUS

PDF

60.3 KB Created: 2020-11-08 08:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b957af9f92e761ae0f6b01485f4df9a0 SHA-1: 03769baa523f5820d70fbc3cde7d7adf6f0f62c7 SHA-256: 16475e0f41060e34d9dd70a45fa9e8b4e02ac0fa1ae52a52fbd52ae8cd0ea3cf
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://traffine.ru/123?keyword=how+to+play+2k19+park+without+xbox+live In PDF document text
    • https://nonudefetug.weebly.com/uploads/1/3/4/3/134314303/7691658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f9428cadbe55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f95ac906f1e2.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/rojobutu_jenuf_fubajaga_gajom.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/4967626.pdfIn PDF document text
    • https://fomezesas.weebly.com/uploads/1/3/4/3/134343882/0e6921c3ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f8c6ccaac6ca.pdfIn PDF document text
    • https://gowokijisamupu.weebly.com/uploads/1/3/4/4/134438950/kokukanuvijesoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_5f9d9ff36af77.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/9c4f01d8-0796-41a2-8f94-16e9e2c468ba/ramafobogig.pdfIn PDF document text
    • https://s3.amazonaws.com/liwelu/apk_weaphones_ww2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b951f22-a16d-4dae-8b12-558531ca19ba/vogexezipip.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_off0000ac32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC32 5556 bytes
SHA-256: 35c31b8db24bad3271219bda9802a02bc8b66f306f111903e212443796aa4d81
font_01_sfnt_off0000bf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF39 10932 bytes
SHA-256: 99375662ef9e7ccb8284a2d6fd7100d2a0602619d15eee2dceddbeecce1f4e86