Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfcf89655b19f2b…

MALICIOUS

PDF

43.6 KB Created: 2020-11-06 16:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f77af7368d51ef6b7a80066cb7873312 SHA-1: 2c7bd39f2edcb00dc59a0f78eb2198a9ca8778ba SHA-256: 1bfcf89655b19f2b4df5730d1de178fa5f95c510cb994c5fc04425ca990631ce
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://traffking.ru/aws?keyword=union+county+nj+small+claims+court+forms In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444655/normal_5fa504752145b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5f905198301cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pifakimep.files.wordpress.com/2020/11/fododuxuxinoni.pdfIn PDF document text
    • https://likuzow.files.wordpress.com/2020/11/40264502684.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/lab_manual_chemistry_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/experiencing_mis_7th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/gedanupavuribodifiromumom.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://degareke.files.wordpress.com/2020/11/42559952430.pdfIn PDF document text
    • https://noxikadaguva.files.wordpress.com/2020/11/34987473215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/335ab04f-0709-4fa4-b324-82bc61d9c05b/ganubulanabon.pdfIn PDF document text
    • https://pagebenudufi.files.wordpress.com/2020/11/rekonavari.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_off00006c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3B 5196 bytes
SHA-256: ab298c66cf76a14affe0f82c5821809696d6ff8c37deccdac8e873699c4b7872
font_01_sfnt_off00007ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDF 10356 bytes
SHA-256: 41382b895df0eba55f1d093719c953871bc2193be852505a1add8529db5254f2