Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dcb4a0aa43f6f9…

MALICIOUS

PDF

41.0 KB Created: 2020-10-10 06:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dcf34107eee7233d3b1b545eeb614b96 SHA-1: b442bd8ff42bb9832b5a6ce520e2c25fabb3185e SHA-256: 74dcb4a0aa43f6f9914a556c8859f6f87652d7ff8eddb6ff9d87d9fa3c5d3028
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=yu+gi+oh+duel+generation+apk+mod+121a In PDF document text
    • http://files.oakleafcounselling.com/uploads/1/3/1/0/131070612/5911f5c46.pdfIn PDF document text
    • http://files.jenscontagiouscooking.com/uploads/1/3/1/3/131379248/kotigexu_gusesefe_webopa_dimesatos.pdfIn PDF document text
    • http://files.dronkadiscountstore.com/uploads/1/3/2/7/132740249/8a65ed05fdcd6.pdfIn PDF document text
    • http://files.tastefuljourneys.com/uploads/1/3/1/4/131453127/popirutopa_ranefigigum_jizusi.pdfIn PDF document text
    • https://site-1038954.mozfiles.com/files/1038954/61381985853.pdfIn PDF document text
    • https://site-1039612.mozfiles.com/files/1039612/78792129715.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/levepuwevibasuluzas.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/9259242811.pdfIn PDF document text
    • https://site-1039846.mozfiles.com/files/1039846/86722458634.pdfIn PDF document text
    • https://site-1039889.mozfiles.com/files/1039889/90724960229.pdfIn PDF document text
    • https://site-1048552.mozfiles.com/files/1048552/wimetopimokefozifamap.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/ef3412a6-50c4-4d3e-ab83-2863b7336986/nanibakagetafakosoku.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_off00006073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6073 5404 bytes
SHA-256: 784adf408f15f253a873ce097a899d3c7b34ccce9f854088725a70dcd6bc11bf
font_01_sfnt_off000072ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AE 10644 bytes
SHA-256: f6e8295eba076eea2a8f01998bcd9a37d06b5d270da94e6ff1008763d13a7a87