Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6772b518f4dbac…

MALICIOUS

PDF

75.8 KB Created: 2021-02-15 14:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ce21fbfa7bf674326229efc946048699 SHA-1: fe6b6d7ca5a5ed487b0e70183ef5c5e873cd32a4 SHA-256: 5e6772b518f4dbac0ae6e7bd8eeeb37404faee5c637f7939aded88b234a47ae8
106 Risk Score

Malware Insights

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

This PDF file contains multiple invisible links that redirect to external websites. One prominent lure is a CAPTCHA-themed page hosted on 'epizy.com', suggesting a credential harvesting attempt. The document also contains a link with a 'utm_term' parameter, indicating a potential SEO-based lure, and another link pointing to a disposable domain. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/strik?utm_term=drinking+quotes+coffee+mug PDF link annotation
    • https://cdn.sqhk.co/xakelafu/0IMWyKt/jazerufirimubapojale.pdfIn PDF document text
    • http://tazogupiwelul.iblogger.org/dujiloxigorigodirumez.pdfIn PDF document text
    • http://gakarefutejet.iblogger.org/tonigobekulupor.pdfIn PDF document text
    • http://lewodazegozi.iblogger.org/irmsa_2019_risk_report.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/8he5bhf/real_life_chess_game_online.pdfIn PDF document text
    • https://sewobefavewekog.weebly.com/uploads/1/3/4/3/134367647/7fb1cc95eafa9.pdfIn PDF document text
    • https://gizumefelaz.weebly.com/uploads/1/3/4/3/134318195/wonakawezotakok_bijiribo.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/jhcgjXa/97147612788.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/vDijhej/52106782756.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/jeiifhh/dokuwata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kirimogopagi.rf.gd/29529248164.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/3672275911.pdfIn PDF document text
    • http://lotapit.epizy.com/auto_captcha_typer_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/breast_cancer_screening_age_guidelines.pdfIn PDF document text
    • http://ligesetuvijaga.epizy.com/android_file_example.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/report_facebook_ngha_l_g.pdfIn PDF document text
    • http://rorujuzolu.epizy.com/balance_sheet_format_excel_free.pdfIn PDF document text
    • http://nabiporemug.epizy.com/championship_form_table_last_5_games.pdfIn PDF document text
    • http://ramufezumax.rf.gd/audio_video_converter_android_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/11313237128.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_off0000e91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 5148 bytes
SHA-256: ae8e8c5002d2bad0318776fb11299881157538c7b74376da25daa944a48df9a4
font_01_sfnt_off0000fa9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9F 11908 bytes
SHA-256: 2bdd898044ba8820c7213ca69c4f4ef111e1721b60ddf761389ea02dcd44738e

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