Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25f0843530754fa…

MALICIOUS

PDF

38.3 KB Created: 2020-10-06 19:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8524b9313bca4d3009735bf810908851 SHA-1: e8d8f5b3862b09086be6eb738e390c6e11fdff52 SHA-256: f25f0843530754fab8c59550a9a076092b063b8aa126a5fc2a7ba22d7cef017a
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=the+philokalia+the+complete+text In PDF document text
    • http://files.horsearenaequipment.com/uploads/1/3/1/4/131438761/8f8c2656aea1.pdfIn PDF document text
    • http://files.soundescapemusictherapy.com.au/uploads/1/3/0/7/130775760/mefuzito_toxidi.pdfIn PDF document text
    • http://files.lanepaperclay.com/uploads/1/3/1/0/131070284/00c6bbe7e3b09.pdfIn PDF document text
    • http://files.barkingbaking.com/uploads/1/3/1/3/131379894/1003889.pdfIn PDF document text
    • http://voxetu.spinetingle.co.uk/uploads/1/3/0/7/130740033/nagagobuko.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/14506191801.pdfIn PDF document text
    • https://site-1040360.mozfiles.com/files/1040360/faduberununiborilozoxa.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/moxevebaze.pdfIn PDF document text
    • https://site-1037059.mozfiles.com/files/1037059/67015881787.pdfIn PDF document text
    • https://site-1043704.mozfiles.com/files/1043704/sosutazumawuwepezalu.pdfIn PDF document text
    • https://site-1042635.mozfiles.com/files/1042635/62744108011.pdfIn PDF document text
    • https://site-1042510.mozfiles.com/files/1042510/kegoposutetuvoduzimerana.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_off0000595b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x595B 4980 bytes
SHA-256: b1668fa07cb44dd1e585afc54aaee516619b4dc7c15438c7f8bb5882ef6c9da9
font_01_sfnt_off00006a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2D 10056 bytes
SHA-256: 3d2d888aef118ca3d0acbcc69ec8a8e83c8010217d1d06d3a1796f1dfe7c3eb1