Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6addba005793353…

MALICIOUS

PDF

40.7 KB Created: 2020-10-01 00:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6a2e7aa6faddabf6723c9ff3e74da7ac SHA-1: 25e907c6890d9bd5a0678e89a8f341848410a93f SHA-256: a6addba005793353fd1eaee8d3b67091fe45009ba584afb8ff5646e4653dcffd
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=statistical+modeling+and+machine+learning+for+molecular+biology+pdf In PDF document text
    • http://files.hyhu2020.com/uploads/1/3/0/7/130738548/7829588.pdfIn PDF document text
    • http://malom.bajarallymoto.com/uploads/1/3/0/7/130739090/xosigoga-fivovuj.pdfIn PDF document text
    • http://reluvuzuv.taichirutland.com/uploads/1/3/1/4/131437987/c93d6d1254d8.pdfIn PDF document text
    • https://site-1038670.mozfiles.com/files/1038670/71669128164.pdfIn PDF document text
    • https://site-1038974.mozfiles.com/files/1038974/69140809202.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/labaguresetekisaxoker.pdfIn PDF document text
    • https://site-1038988.mozfiles.com/files/1038988/susubexijalelanez.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/1/0433/7195/4334/files/64599137464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c82ec84-cd84-4482-8034-f74d13283ae4/62331858114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c807e135-6651-49c2-86e4-d786a7f9c6b9/zivusozofanaperawizoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d63bd6-6b93-474b-b8f0-d59f9a8f7aa4/21042016104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96248765-31ce-4523-a89f-17ec464616f0/fagokapexegosapifiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b922deef-f149-4256-a7b2-452083736a85/94618873823.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_off00005dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD8 5912 bytes
SHA-256: 4773a77099f02facd9c12bca1b10d8d45594cb0afca6aeb10c7bfc042558c4d5
font_01_sfnt_off000071cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CB 10460 bytes
SHA-256: 419f66e96b394cc1db777623abbb69d1f3424c3c279b2a022de1f740ca002b9a

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