Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f89071cc3eaab6a…

MALICIOUS

PDF

68.5 KB Created: 2021-02-23 04:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1c800a327aef62d1f2aa39c0cb506307 SHA-1: 6432246c5c51c554025f5ee73f327f7736bd4aae SHA-256: 3f89071cc3eaab6aea9b848aa8a54379af438c3e16bd2605277ed36e6323988a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=ping+pong+club+nyc PDF link annotation
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/a78b1065125.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/jibhcjg/27274763037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_602860ce492a0.pdfIn PDF document text
    • https://vetenejoxo.weebly.com/uploads/1/3/1/3/131379321/gometopukas.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/fIrYna2/download_piano_tiles_2_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/aukzgjT/fonemeposutatalexewimow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479212/normal_60244a7d72cd6.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/hdRjahf/6241745495.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5fcdb21c5c4e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474997/normal_5ff0c43d10b02.pdfIn PDF document text
    • https://belaputeze.weebly.com/uploads/1/3/4/5/134515271/7183217.pdfIn PDF document text
    • https://wadezadoli.weebly.com/uploads/1/3/0/9/130970015/8004136.pdfIn PDF document text
    • https://bufekebutejef.weebly.com/uploads/1/3/1/8/131856184/3655301.pdfIn PDF document text
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/8862442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_600dc4efc602a.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_off0000ce17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE17 4860 bytes
SHA-256: b69603fbee8215a1e0b01582e107f6c08083c8ddba7f6b2766b32f4b69e09b0b
font_01_sfnt_off0000dec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC8 11324 bytes
SHA-256: c48da0b7154b86a6fdf71474bc28ba0e3a7e7ffeec77716dacfad78cc88dcec3