Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e7f5c189759f42…

MALICIOUS

PDF

49.3 KB Created: 2020-11-07 07:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 2f7b3b7f81c7ad36dfbdc04597661ab9 SHA-1: 242647d46e203a0f9c4a5309f992ced78a4442a9 SHA-256: c7e7f5c189759f42feaa68921bf597f3acedddc3f039468eb486e8c5915f3467
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=spitter+ben+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f889c196c675.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/d71767245d03.pdfIn PDF document text
    • https://poxuxeket.weebly.com/uploads/1/3/3/9/133997588/2d38a86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xuxedoki.files.wordpress.com/2020/11/pumusoxekovone.pdfIn PDF document text
    • https://nimiforaxub.files.wordpress.com/2020/11/58086966700.pdfIn PDF document text
    • https://japegotof.files.wordpress.com/2020/11/menujorakesobugobagatun.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13cab790-7b04-4a76-8cc8-00a90b0916d8/words_ending_with_sha.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.pdfIn PDF document text
    • https://zupabetoki.files.wordpress.com/2020/11/flipaclip_mod_apk_2.2.8.pdfIn PDF document text
    • https://dogisur.files.wordpress.com/2020/11/nabozageguxa.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/81796472247.pdfIn PDF document text
    • https://vifosuz.files.wordpress.com/2020/11/kubivanovorizowuzulidup.pdfIn PDF document text
    • https://rovafola.files.wordpress.com/2020/11/bruce_lee_le_jeu_de_la_mort_streamin.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_off00008485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8485 4828 bytes
SHA-256: b2ad25fcb4833a3315fe346e6fa32b90e18d2654f78612dc94bf8fdca4fc85c1
font_01_sfnt_off00009503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9503 10516 bytes
SHA-256: f0528265f5eebe4d253b47e2347d460ffda4924339e91076f02db8b0256851de