Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e76b4f44602c41…

MALICIOUS

PDF

83.9 KB Created: 2021-02-21 05:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 25765374c5cea8ae7c89c376468dc9e5 SHA-1: 106894c4b2922c45ab590d8a8f0ff600dc2beb7e SHA-256: 23e76b4f44602c4128c887356696f44afc68bc0a21bb9c66de300240d5322bce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious intent, including external URI usage and being flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware delivery document. The embedded URL likely serves as the initial lure, directing users to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=how+much+is+a+pulse+ox PDF link annotation
    • https://tulugawaluga.weebly.com/uploads/1/3/0/9/130969515/8ba4a027218444.pdfIn PDF document text
    • http://xakavewazoxejef.22web.org/kung_fu_panda_2_full_movie_in_hindi_dubbed_youtube.pdfIn PDF document text
    • https://volafonozus.weebly.com/uploads/1/3/0/7/130775232/fusagawopukuzo.pdfIn PDF document text
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/sisasowutovo.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/hgAhcky/37139306630.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/dQjcxMw/86151663871.pdfIn PDF document text
    • https://rigopodi.weebly.com/uploads/1/3/4/3/134307943/badamotaz_nomanoralaxil_rebowinax_fifixawelun.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/KcE8jbE/kaves.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/8jh6idy/apk_mod_money.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifoxunif/jjgjwja/new_bollywood_songs_2019_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruvatarojamun.rf.gd/nuraxumuribikatazejeze.pdfIn PDF document text
    • http://dudulexo.epizy.com/leropijusekogekupokiwufiw.pdfIn PDF document text
    • http://zekakodususebu.epizy.com/xinutepe.pdfIn PDF document text
    • http://nerelikeg.epizy.com/15240296371.pdfIn PDF document text
    • http://fizefitelibulob.epizy.com/defensive_driving_answers_quiz_1.pdfIn PDF document text
    • http://volowunodevikel.rf.gd/xefudefamawiselemupodo.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/nejewazedemodepobosiki.pdfIn PDF document text
    • http://totofexux.epizy.com/kixiwulemukosatiwu.pdfIn PDF document text
    • http://getetir.epizy.com/4172165749.pdfIn PDF document text
    • http://xuxerikafirin.epizy.com/reflected_cross_site_scripting_cheat_sheet.pdfIn PDF document text
    • http://fixuzobimube.epizy.com/recommendation_letter_for_colleague_template.pdfIn PDF document text
    • http://foripoj.epizy.com/meeting_attendance_sheet_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/ti_nspire_cx_cas_2_games.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C5 5196 bytes
SHA-256: 4e5d131ef6cac8fa0d004dbccf43c641c4443671ce5678f91c15652cf82ade61
font_01_sfnt_off00011a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A61 11824 bytes
SHA-256: a87006bb1c92159a8a7c517fef9cbc9d62eb5d2c8ff00eeda86cc22f595b6a48

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