Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c50da74050245b8…

MALICIOUS

PDF

40.3 KB Created: 2020-11-07 18:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 6ca6afd943d500e3991994cbb0a94dec SHA-1: 92cd6e89ed12debabd5badeae7bd1db853336d8d SHA-256: 1c50da74050245b846948d84e9b0a0dcdbe0ed5cae6f70dd2d8c14ad7bc0ebc0
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=world+war+one+test+study+guide In PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/tutizakozetelikoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f962404ae16b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kozosimo.files.wordpress.com/2020/11/75255550865.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/17929338940.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/ea_account_password_reset.pdfIn PDF document text
    • https://vejegomume.files.wordpress.com/2020/11/eso_repair_kits.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/rivertown_movie_theater_prices.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a131bee9-cbb1-4cf4-b25c-f9c37379bc5d/69398701008.pdfIn PDF document text
    • https://turasugi.files.wordpress.com/2020/11/69678873757.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_off0000600a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600A 5200 bytes
SHA-256: 942df995309dd0d8962ff5af584bea947389798649ac19871f57b2529b3fc725
font_01_sfnt_off000071e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E2 10336 bytes
SHA-256: 108f75cf447e30b5ccc3b964b4b103c2c1575390cff7598d1859c39df13ab201