Malicious PDF — malware analysis report

Static analysis result for SHA-256 142c4d262fa43427…

MALICIOUS

PDF

48.1 KB Created: 2020-10-02 23:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 641967c0da65d3192b3bd56d7e311cd5 SHA-1: ef10a52be989f6cfa373d27436d25a6057c43b9d SHA-256: 142c4d262fa434274cf02dc56722274fe19828be012a047104940b0a85bc5fd6
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/pify?keyword=los+rios+de+color+purpura+pelicula+completa In PDF document text
    • http://files.spaceliftinteriordesign.com/uploads/1/3/0/9/130969915/4853761.pdfIn PDF document text
    • http://pekozetu.computerscienceresources.net/uploads/1/3/0/7/130776824/fedefelejiw.pdfIn PDF document text
    • http://luneza.tehamata.com/uploads/1/3/1/8/131872048/978b556a91a.pdfIn PDF document text
    • http://lurex.jazzclubsnw.org/uploads/1/3/1/4/131437208/dedetud_wirowin_filajibawifu.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/sitipabezifidosujewokowov.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/59332493330.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/34075871982.pdfIn PDF document text
    • http://files.aedclemson.org/uploads/1/3/2/6/132682436/ea4abc49e.pdfIn PDF document text
    • http://files.reliabletrust-translations.com/uploads/1/3/0/7/130775565/3281fc.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A14 5160 bytes
SHA-256: 11abfbade64433e0aa0401cfb93bf52c8c8b515947bb9fd7deb0f6f95d1e5a71
font_01_sfnt_off00008b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8D 11852 bytes
SHA-256: 4c4dbc1d47c0bfb0dcbb34bcdd00f01fc95bfcefeeb1a3e640611e5202f721ae