Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec9125963a4a3bc…

MALICIOUS

PDF

70.6 KB Created: 2021-03-16 21:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4f3cadac42563b7b6d78576d3d92d904 SHA-1: cff335bc54b1946ccbe44fbdb8c29f2c5fa49c6d SHA-256: cec9125963a4a3bcbad488079ff5df4e59e4f93e9f65954ebee834a4e3214db9
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URIs pointing to various domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ponafet.ru/wix?keyword=boba+loca+coffee PDF link annotation
    • https://fumitalabojaluk.weebly.com/uploads/1/3/5/3/135399187/1578453.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/what_is_matrix_structure_in_organization.pdfIn PDF document text
    • http://webdefilmizle.com/buxuluwexetevejjoyyk.pdfIn PDF document text
    • http://dalkomis.website/kapusatolobq71mn.pdfIn PDF document text
    • http://flowerport.market/vivebunikepukoxebipuzutuphcx8f.pdfIn PDF document text
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/kajelirelula-guteretofiju-kuxejijinova-xutivam.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/6gdihhj/16039853520.pdfIn PDF document text
    • http://heliusdesign.ru/jevadakel00rh.pdfIn PDF document text
    • http://gratoraama.website/96411836503ehsje.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/managerial_accounting_asia_global_edition_2e_solutions_manual.pdfIn PDF document text
    • http://successinyourlif.website/how_to_master_limits_calculussxtwq.pdfIn PDF document text
    • http://boothattendant.com/twitter_sports_pickso8r4n.pdfIn PDF document text
    • https://cdn.sqhk.co/fopajuxalaso/ihgfhj4/performance_evaluation_report_rules.pdfIn PDF document text
    • https://dexuwoborusise.weebly.com/uploads/1/3/4/3/134375282/647340.pdfIn PDF document text
    • http://sivesesugipode.scienceontheweb.net/46264640380.pdfIn PDF document text
    • http://newberginvestmentproperty.com/corrugated_tin_sheets_northern_ireland82jjy.pdfIn PDF document text
    • https://taxufizewafodo.weebly.com/uploads/1/3/4/4/134477277/8989989.pdfIn PDF document text
    • https://cdn.sqhk.co/muvenetu/ibjbgfD/war_theme_instrumental_ringtone_download_pagalworld.pdfIn PDF document text
    • http://circulyarkadigital.xyz/77474967898mcann.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/Hjdiafr/94875082591.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/much_ado_about_nothing_character_analysis_claudio.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/18838124918.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a72f2cd8-ce5f-458d-a53f-20fc596429b4/catherine_ponder_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdac7f4b-f1d9-4596-927f-28cc7ccc95fc/gekoxaravevujigavoboka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a14c8f6-3817-4d2f-acd0-562c0a393056/how_to_get_rid_of_pimples_scars_fast_at_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d54f4d-4b98-49ce-8953-8f51690e1c33/moneyball_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26929109-c330-43f9-a4ce-acf691bc8b7b/vonozovakalolivawemotofu.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_off0000d789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD789 4788 bytes
SHA-256: 573eae82b914af0296d9a42609e2edde574b71df68ab818009be3f2f5ebce628
font_01_sfnt_off0000e7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F0 10956 bytes
SHA-256: ecc177f928de6b99313b90431dfcf428cd22c3e0f7e08c0be7f39fe4fad07245