Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd4c311dad30434…

MALICIOUS

PDF

43.3 KB Created: 2020-10-03 16:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5433e3ab9179f2b44de751590260cc8e SHA-1: e00d6487897c92ac792af6e4fe25f1177b04aeb4 SHA-256: 0cd4c311dad304346328134a74eccb99e924f214fea687a412200f0dded7210b
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=acer+aspire+one+d255+network+controller+driver+windows+7 In PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/87253783609.pdfIn PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/86533218859.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/17214791150.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/8324999069.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/zazijigikeg.pdfIn PDF document text
    • https://site-1037073.mozfiles.com/files/1037073/mofulugezakawavabeb.pdfIn PDF document text
    • https://site-1036934.mozfiles.com/files/1036934/62831040477.pdfIn PDF document text
    • http://xeteroli.nwlaautomationgroup.com/uploads/1/3/1/6/131637131/719bfdd13cca1c.pdfIn PDF document text
    • http://ledifaro.simplycreativetreasures.com/uploads/1/3/1/6/131606271/25a91937a.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/46f68ca5-3b68-4754-87c6-fe90370270fd/15635210541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c475be-4b91-4e41-a6d3-620725130dbf/81402432725.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_off00005c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C26 5608 bytes
SHA-256: 0691eabcddb03d6ff2730667875a5b3cfac57b9a2bdc0b7eee51e9e99bc772a1
font_01_sfnt_off00006f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F75 15208 bytes
SHA-256: 1cdbde2e6803ed0e0b61c33f14dbce5f81eae9f0cc9c09c43d24479dade63cbe