Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be2c3d0d48d605b…

MALICIOUS

PDF

36.9 KB Created: 2020-11-08 13:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 970be8f67fdc881459b1c167afb8b44e SHA-1: bdcc1e86f3d69fc184e346bb6ed6df9ae5c44551 SHA-256: 6be2c3d0d48d605bcaa2456c6550221b6909af35a250d2fb61f593cc2815d30b
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://trafffe.ru/123?keyword=caldwell+willoughby+cattle+sales+online+sales PDF link annotation
    • https://sagoxanoku.weebly.com/uploads/1/3/4/3/134350044/woselibeforak-tinob.pdfIn PDF document text
    • https://jikolugoxolij.weebly.com/uploads/1/3/1/3/131379047/6924212.pdfIn PDF document text
    • https://xepebujusu.weebly.com/uploads/1/3/4/3/134319702/nasokepojonoxil-juxijurak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407996/normal_5fa3ce1abc282.pdfIn PDF document text
    • https://sigakoge.weebly.com/uploads/1/3/4/4/134437147/09447303f752.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gexuzovi.files.wordpress.com/2020/11/dajegabux.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/how_to_adjust_a_rifle_scope_eye_relief.pdfIn PDF document text
    • https://nerofisela.files.wordpress.com/2020/11/managerial_economics_12th_edition.pdfIn PDF document text
    • https://pefatukumon.files.wordpress.com/2020/11/vovanulunudu.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_off00004ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE5 5344 bytes
SHA-256: e2cb1bc65d3917f5fb764797e09ba1c8ca572297267c29cb87fa62bae32c47f9
font_01_sfnt_off00006121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 11068 bytes
SHA-256: 419ad8b5342d23e3ca258e28f16b10860bb7649e282e030600945e8ce719e57a