Malicious PDF — malware analysis report

Static analysis result for SHA-256 b625f83340214e26…

MALICIOUS

PDF

57.4 KB Created: 2020-10-12 09:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 103f7f8eb05cdbbe1cb32b991da69b1b SHA-1: 7f70cb0238233527f5df5e30457cb9d7e0d58fa2 SHA-256: b625f83340214e261083c25891df995443315db48ce35dbff6c7c1893d97df1f
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=cowin+e7+review+cnet In PDF document text
    • http://madowir.cgcpoems.shop/uploads/1/3/1/3/131379205/6438117.pdfIn PDF document text
    • http://batadevu.savwee.com/uploads/1/3/2/8/132815004/mowedu.pdfIn PDF document text
    • http://zomano.chickiebean.org/uploads/1/3/0/7/130775470/fupepid.pdfIn PDF document text
    • http://files.merrittathletics.com/uploads/1/3/1/1/131164440/7795015.pdfIn PDF document text
    • https://site-1043158.mozfiles.com/files/1043158/1253097645.pdfIn PDF document text
    • https://site-1037833.mozfiles.com/files/1037833/72230137920.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/bubakafadevuvijesobedeze.pdfIn PDF document text
    • https://site-1037096.mozfiles.com/files/1037096/rodaxigofarumaro.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/winudozidiw.pdfIn PDF document text
    • http://jalabapof.crabhousefortsmith.com/uploads/1/3/0/7/130740316/db039d7c8b3.pdfIn PDF document text
    • http://files.mrmichaelfinney.org/uploads/1/3/1/0/131069753/3042006.pdfIn PDF document text
    • https://site-1039224.mozfiles.com/files/1039224/39300957102.pdfIn PDF document text
    • https://site-1039830.mozfiles.com/files/1039830/91122933015.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F41 4512 bytes
SHA-256: 741c220a9f53800a9ffff1f53db03245e4cbfa730801c3e84c847626544be733
font_01_sfnt_off00009ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC1 10724 bytes
SHA-256: 9c8fa561efca69f432d6d826a2cb1272070a706138234d0c2d7bdc748deadd87
font_02_sfnt_off0000c359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC359 16148 bytes
SHA-256: 51babe3b44e703ca5a92278b053c112c5c116674d3b708c8e2cb3e4aa6bd9a04