Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb1d4ad506647dd…

MALICIOUS

PDF

40.0 KB Created: 2020-10-02 17:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2ff4180632df019833333fd01c62458e SHA-1: b71963629edb9ba9028e1dc5218efb8cc4dad516 SHA-256: edb1d4ad506647dd8e40383364051e083d8f12b5a4bd108e938733f530f8b89d
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://ggtraff.ru/strik?keyword=ejercicios+operaciones+basicas+para+secundaria In PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/95247318105.pdfIn PDF document text
    • https://site-1037914.mozfiles.com/files/1037914/65563666488.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/21106727591.pdfIn PDF document text
    • https://site-1037907.mozfiles.com/files/1037907/59113191383.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/41517932523.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/lukuzusewi.pdfIn PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/kaxefoliri.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/51205574567.pdfIn PDF document text
    • http://vesolo.seasonalshowers.com/uploads/1/3/1/4/131438397/99922502f83d.pdfIn PDF document text
    • http://runinuza.columbiarivercooperative.com/uploads/1/3/0/7/130740537/bofopuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14e1761-32fe-4d74-90dd-37abd664b0b1/badutoxamafepibado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46baab5-1966-494d-9a4d-7cc151c1a968/gukoforokivezixuxozo.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_off00005a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A66 5208 bytes
SHA-256: 1bd7859d0da2bee11dbcafdb407c03399a4277451a3cdd2e5f8566c19710a87c
font_01_sfnt_off00006c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C28 11452 bytes
SHA-256: 68d63fe96cd44616f09728e1930bd00a5366266b8e668e4dc98d6278ae75c77f