Malicious PDF — malware analysis report

Static analysis result for SHA-256 b369235bef01369a…

MALICIOUS

PDF

38.1 KB Created: 2020-10-15 05:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bb9b069fe7241e1154352dcdc62cebcb SHA-1: fe37b8abe7d6ce4b83b534f4c0917db0000acc88 SHA-256: b369235bef01369a732a8b998af6544b1888e9850fb02f3252c5809aa770f700
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=como+unir+pdf+en+un+solo+archivo In PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/74c746afc6.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/kefasene.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/7833278.pdfIn PDF document text
    • https://rigonabex.weebly.com/uploads/1/3/1/4/131483185/zereb_fabasopon.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/xaloni.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/karilikalim_pasixuzamozib_vobosekipepele_lixirilajuvi.pdfIn PDF document text
    • https://site-1038299.mozfiles.com/files/1038299/27323152578.pdfIn PDF document text
    • https://site-1038890.mozfiles.com/files/1038890/28209614651.pdfIn PDF document text
    • https://site-1042889.mozfiles.com/files/1042889/23632043294.pdfIn PDF document text
    • https://site-1042016.mozfiles.com/files/1042016/24834749875.pdfIn PDF document text
    • https://site-1037875.mozfiles.com/files/1037875/womikujidovilug.pdfIn PDF document text
    • https://site-1039179.mozfiles.com/files/1039179/3494784297.pdfIn PDF document text
    • https://site-1039873.mozfiles.com/files/1039873/14198633202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f87704b2fa2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f8787335415b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f8785e6dae86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f877b2137cc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f8726b32be5e.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/05c780aa-8bf3-4489-a9ca-8f71c0c7a6e1/743034992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8dc472-a57d-42b4-a2cf-2f734879be8a/47583441297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07142a68-7e54-4def-997a-3b335ade92f3/panefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8135cd-1453-4bf9-9dd7-d4af6541217f/nizasotusawotazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a11652f-311a-4409-be40-36d78d51cf64/18442833407.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_off00005411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5411 5360 bytes
SHA-256: a0ee8d6611a9d23aabb8648a1d06198d13fc0c0f51090e087d3131903604c95e
font_01_sfnt_off00006628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6628 10848 bytes
SHA-256: 7b80e394d04e44b03314b6780d7a2a745138d5a795b80760fe56cfdfaf2fa5f2

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