Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5214ae2a05f883b…

MALICIOUS

PDF

38.9 KB Created: 2020-11-06 17:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 53e82888930ad7973342ec2416f5e7a7 SHA-1: c1f89ce72d76f050ea81db21598a095db890e046 SHA-256: f5214ae2a05f883b50ca3565f4fc14959eed5d34fd2bb1951f9f48ca34347edd
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=mayfield+tv+guide+gears+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5f91eac425058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_5f950b072e8bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_5f95a60b1b572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f897c7d0ae7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_5f96c390350f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8711a8e383a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f8847f3a3362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8dedae421f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_5f92c1049cd31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sirilab.files.wordpress.com/2020/11/21530769035.pdfIn PDF document text
    • https://ripigewub.files.wordpress.com/2020/11/sevakupiwejukoduzolaz.pdfIn PDF document text
    • https://lusabun.files.wordpress.com/2020/11/38072893717.pdfIn PDF document text
    • https://lokepirofav.files.wordpress.com/2020/11/doroxefetases.pdfIn PDF document text
    • https://gigevuko.files.wordpress.com/2020/11/1554592316.pdfIn PDF document text
    • https://likuzow.files.wordpress.com/2020/11/40264502684.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.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_off000055b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B5 5440 bytes
SHA-256: 1947b97269a0e6c67344982377ca4d3483536e5753292a37228a433bcb034966
font_01_sfnt_off0000686e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686E 10548 bytes
SHA-256: 8f9179df9878b035657d1330414102f3b9bd13a0ca47b44fbdca339b2efab34a