Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc0be286ffce5da…

MALICIOUS

PDF

67.5 KB Created: 2021-02-16 03:38:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a90541108710da331b678b331ef92045 SHA-1: 66479285dc75b5edd406ba34eb623cdeb22ce87f SHA-256: 4bc0be286ffce5da4928214f160f355c394092469cdda399438ddcb9c94d7eb3
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://leonvi.ru/wix?keyword=kingroot+latest+apkpure PDF link annotation
    • https://cdn.sqhk.co/kufalavoxig/nXhepje/54125714952.pdfIn PDF document text
    • https://jejepijukutu.weebly.com/uploads/1/3/4/1/134131362/2621183.pdfIn PDF document text
    • https://bosagibanili.weebly.com/uploads/1/3/2/6/132682134/lezigemafelepa.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/d4jfjgz/3967032863.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/2ltqXnN/nijorikidotiwutifetu.pdfIn PDF document text
    • http://pagebake.com/homemade_burger_grill_time1ew0l.pdfIn PDF document text
    • https://bojuwakuxejekur.weebly.com/uploads/1/3/5/3/135347713/6ae127ec5.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/ibzaifo/gomizaludapul.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/b253de5694613e.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/iaCjaii/skate_dice_app_android.pdfIn PDF document text
    • https://moxamegok.weebly.com/uploads/1/3/3/9/133999551/a46263ba492.pdfIn PDF document text
    • https://cdn.sqhk.co/riragimi/hege6Xp/red_ball_5_jump_ball_adventure.pdfIn PDF document text
    • https://cdn.sqhk.co/gixekoji/fhdFhhb/school_days_anime_episode_7.pdfIn PDF document text
    • http://m-laskin.ru/gerazexedowezagebapuzf51zl.pdfIn PDF document text
    • http://ig-copyrightviolation.com/8344355413lg9zb.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/gk19ieW/69498856762.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_off0000cdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF6 5020 bytes
SHA-256: 5473f903139b9cd28b894d70f2df5710ab9bce408111023d0d8497418c53bde8
font_01_sfnt_off0000df1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1D 10012 bytes
SHA-256: 5535a4d713fd717aca858c87bd49fa106b661635893909f79c9327a20e264bde