Malicious PDF — malware analysis report

Static analysis result for SHA-256 d515da44b9f9709a…

MALICIOUS

PDF

74.4 KB Created: 2021-02-24 06:17:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 0130047ec59511710c3421bb268fb09f SHA-1: 7a5aede19ba4a8de8e9fd4220cb538c9a77b3713 SHA-256: d515da44b9f9709a837674bac373a89fb3e24251a686057585e2f7251222f0e9
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to a book translation, likely to entice users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/strik?utm_term=le+petit+nicolas+english+translation+chapter+2 PDF link annotation
    • https://cdn.sqhk.co/moxoxitij/rdYhggj/snake_mania_jeu_facebook.pdfIn PDF document text
    • http://good-production17.site/72574059652zq91w.pdfIn PDF document text
    • http://detonic-buy.website/bassinet_fitted_sheet_australiadt6t8.pdfIn PDF document text
    • http://naturagrush.space/shark_bite_fitting_sizeseanp1.pdfIn PDF document text
    • https://vekiruwubutut.weebly.com/uploads/1/3/1/0/131070393/5952444.pdfIn PDF document text
    • http://micrometer25bill.site/example_of_accomplishment_report_for_summer_job7ho7a.pdfIn PDF document text
    • http://agentsoft.space/9402330789738987.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/dhjgjQW/94046442428.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/poxilaw.pdfIn PDF document text
    • http://itawegan.space/xukebavumulaxovwpub.pdfIn PDF document text
    • http://subfamjtii.site/books_like_the_knight_in_rusty_armorloikm.pdfIn PDF document text
    • http://argo-tourism.com/445597778355vgoj.pdfIn PDF document text
    • http://pokemonrivals.online/aircrack-_ng_free_for_windows_xppygub.pdfIn PDF document text
    • http://spencermcman.us/english_grammar_quiz_questions_and_answers5nsh2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vumigewinumuzi.epizy.com/excel_bedingte_formatierung_text_wenn_zelle_leer.pdfIn PDF document text
    • http://wetafemef.epizy.com/3006347212.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_off0000e600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 5268 bytes
SHA-256: e1a7edca1de97a0fcdc10881700fff93803c6250e161cb8f9752614793ff2576
font_01_sfnt_off0000f7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E5 10688 bytes
SHA-256: 9aec96c310860fb2c1b8cdbf5cb6d68882b7338c649df5ef4b38ff8673e832d0

Open this report in the interactive analyzer, or submit your own file for analysis.