Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb347ca8c7f5466…

MALICIOUS

PDF

83.0 KB Created: 2021-03-18 18:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 80d3a057e8d3678b7cf4402ebef5ae01 SHA-1: c0c5af30771c9b9a1a637237981bd0f1afad8700 SHA-256: 5eb347ca8c7f54668ab782e7264f2d5c1b759d51d39d57444673b11457cf6ead
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for malicious links. The primary malicious URL identified is https://jumiwimov.ru/wix?keyword=power+practice+worksheet+answer+key, which is likely used to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://jumiwimov.ru/wix?keyword=power+practice+worksheet+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477401/normal_6046dfdcf088d.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/48650738613.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/jiIAEQm/wakusesetolukewidof.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/djfe8NE/catch_mastery_ghost_research_tasks.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/fjgThft/doxuveputetejajud.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/gdxt6jj/89797134502.pdfIn PDF document text
    • http://damodudajipofem.22web.org/sony_bravia_tv_ing_apps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5fff81d25b7a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449009/normal_6023f0922abfd.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/QXprhfs/planet_star_wars_battlefront_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_600c0f5299f60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://babematalal.epizy.com/axure_rp_8_team_edition.pdfIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_2c6ea18e922b43a48157e9d66f5e4ec8.pdf?index=trueIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_db4e40a29eab4427ac67bd544e6347d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e81be64-c44a-4fd9-8478-891fab8dcfb9/74888913042.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/88382976772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf01c9e-457e-44a1-b471-aea2428e1984/10403427632.pdfIn PDF document text
    • http://sowinoto.epizy.com/guia_ceneval_derecho_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/according_to_matthew_full_movie_mkv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec56eae6-1065-41c8-8a94-2d0966a4cd91/bubofebibupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a136efda-a646-4599-be9f-82295f7c38f1/life_fitness_elliptical_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ae4a9f-669a-4804-aac7-ad8a428f1619/mathematics_formulas_for_ssc_cgl_exam.pdfIn PDF document text
    • http://jivatufuwofed.rf.gd/5_ways_of_managing_conflict.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/vuwinab.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/serie_the_leftovers_trailer_espaol.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_off00010595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10595 5248 bytes
SHA-256: f4ac83daee2d799871d5eddd244813107375cbbdd1222a9464d1deaead0653b0
font_01_sfnt_off00011782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11782 11520 bytes
SHA-256: fb05f1e1d1d8f46acdb3d0296278c948822be61df6047142a4fa2cac5d464a5c