Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb08c4ec8c7770e7…

MALICIOUS

PDF

40.5 KB Created: 2020-10-09 05:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 462262410a2d6a26c7badc652a9de3c1 SHA-1: 0abc7a1165a7379b782d43d0423052db30512c17 SHA-256: eb08c4ec8c7770e7c81e42ccdc775da93859980d54ef0c1f5175186e7ea537c5
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=valve+seat+material+selection+guide In PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/25962288698.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/xoxufefuzimipiripifo.pdfIn PDF document text
    • https://site-1038583.mozfiles.com/files/1038583/60226509092.pdfIn PDF document text
    • https://site-1037268.mozfiles.com/files/1037268/sorovun.pdfIn PDF document text
    • http://tajari.werotary.org.uk/uploads/1/3/1/3/131384013/3008834.pdfIn PDF document text
    • http://files.dylankcmac.com/uploads/1/3/0/7/130738822/6649206.pdfIn PDF document text
    • http://files.precisionimprint.net/uploads/1/3/1/0/131070289/wegufobexi.pdfIn PDF document text
    • http://sisoki.lquertportfolio.com/uploads/1/3/0/8/130813961/a61a619403a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6428/6618/files/29869144754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4673/1930/files/juturolijefat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3123566-8846-4d7e-a4c8-019c3bdce990/pinorewuwigakomebiziwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39bcfcae-be44-476d-a3e8-01cd003c42b5/65492017619.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_off0000607e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607E 5284 bytes
SHA-256: 857819182b74fd0b9317ccde45ffdf168f25c0186e960cac4d2c7db3434d094f
font_01_sfnt_off00007269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7269 10272 bytes
SHA-256: af79fa3f98b448006475a8a693fb0d57e450732fe6c83cf96f1a0587753d56b0