Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfcbc138691284e5…

MALICIOUS

PDF

41.6 KB Created: 2020-10-08 04:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 42f0ec7b6fe2cd27b42c99d5f8bcc9fb SHA-1: 55b0cc55b5aba61c132465eb351412a3770a0f26 SHA-256: cfcbc138691284e5cb67896c676f5beb71a791536968582650212b0becd18d44
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=fnaf+sister+location+download+free+p In PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/rifenoludasaxamuzozife.pdfIn PDF document text
    • https://site-1040145.mozfiles.com/files/1040145/rekijegobexutelulet.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/19294954715.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/pabutag.pdfIn PDF document text
    • https://site-1039400.mozfiles.com/files/1039400/59950086539.pdfIn PDF document text
    • https://site-1044109.mozfiles.com/files/1044109/45907389377.pdfIn PDF document text
    • https://site-1042107.mozfiles.com/files/1042107/lovuzojawijivakanifamesi.pdfIn PDF document text
    • https://site-1037071.mozfiles.com/files/1037071/wosirad.pdfIn PDF document text
    • http://files.rhiannasboutique.com/uploads/1/3/2/6/132695329/9b7851bd187c73.pdfIn PDF document text
    • http://milaluvun.iaweworks.org/uploads/1/3/1/4/131453150/kawanupejopopag.pdfIn PDF document text
    • http://files.armentroutphoto.com/uploads/1/3/2/6/132682585/5200370.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5144/9504/files/basic_laboratory_methods_for_biotechnology_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4405/2898/files/74787811681.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_off000063e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E4 5196 bytes
SHA-256: 7595e5a64973907a57630047ef31f458f5196441350389af00497af45fde4ee2
font_01_sfnt_off000075ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75BA 10420 bytes
SHA-256: 41a206a4878e4d3cd7550122540cb54f02a6580d77f145e5ac8a1cc31db959a4