Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43d0c3c5bad7412…

MALICIOUS

PDF

78.4 KB Created: 2021-02-24 19:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 66d78dc7d3967e729c43ede657c692c6 SHA-1: e105d30ac1ae2e310622cda177a96fe9a34ef9f8 SHA-256: d43d0c3c5bad74121b31954c8fdbe2821875e5c15c9df45f563ace5777658093
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wb?keyword=recolecci%C3%B3n%20de%20datos%20estad%C3%ADsticos%20wikipedia PDF link annotation
    • http://nizavevorupuj.mywebcommunity.org/gusipumefoxopuwinexipizir.pdfIn PDF document text
    • http://uchebnoe.website/firamafaroarsgq.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/gea09jh/kovimesevurefozepoba.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/9782241.pdfIn PDF document text
    • http://redirunna.xyz/ielts_preparation_test_with_answers9rkzj.pdfIn PDF document text
    • https://veguxalefimas.weebly.com/uploads/1/3/1/3/131382166/d45c22105672dd5.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/hhhcZhj/xilagodunisego.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/7dwjdUE/didoninaminojax.pdfIn PDF document text
    • https://vawevoza.weebly.com/uploads/1/3/1/4/131482963/lasiri.pdfIn PDF document text
    • http://reznitskygallery.com/29448036942xzos8.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/jiSiedn/ancient_history_definition_geography.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/tuck_everlasting_book_vs_movie_essay.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/Yjjjegf/8333374626.pdfIn PDF document text
    • http://romeita.fun/buvefotesojeliwi7f9el.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bukogog.epizy.com/browse_root_folder_android_from_pc.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_off0000f35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35A 5324 bytes
SHA-256: b9d234315938c7149d9fc142402b70475f822f3a0127ff3b724af27138860717
font_01_sfnt_off0001055f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 11568 bytes
SHA-256: fc8c128a9d3abec395c9e392bc7ed8eec94914d6aa152c081422a3549b3696c1