Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3bece9411843f9…

MALICIOUS

PDF

73.1 KB Created: 2021-03-01 20:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 35e47e2eac677ab056175a70d38329db SHA-1: ce783bcdee949321a4b58bb6ffda9c5a47475383 SHA-256: 5f3bece9411843f99afc6dd3fa4d1557634d5306376b817df2d613abd3ed4153
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wb?keyword=6%20steps%20of%20dewey PDF link annotation
    • http://daravto18.ru/maths_puzzles_with_answers_download4r0mu.pdfIn PDF document text
    • http://getfreecreditreport.info/button_tag_submit_formoqte7.pdfIn PDF document text
    • http://takipleskazan.org/bleacher_report_live_aew_buy_in55261.pdfIn PDF document text
    • http://xumarageli.22web.org/chachi_420_full_movie_free_300mb.pdfIn PDF document text
    • https://pikotawikeju.weebly.com/uploads/1/3/4/4/134496208/federipijakon_gifexeje_rizizilojibep.pdfIn PDF document text
    • https://tuzafezinaxav.weebly.com/uploads/1/3/4/3/134319976/81f0f81f13a.pdfIn PDF document text
    • http://barbanapoli.moscow/8341333002qaxfs.pdfIn PDF document text
    • https://tanibabinilez.weebly.com/uploads/1/3/4/0/134018029/4371b05d40f0.pdfIn PDF document text
    • http://fakts.design/love_ringtones_free_download_for_mobile_mp3_teluguosm0u.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/preterite_vs_imperfect_exercises_with_answers.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/98265fe3b981ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saduxax.epizy.com/24869046543.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/primavera_risk_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/rufir.pdfIn PDF document text
    • http://disoluje.myartsonline.com/how_to_reset_my_timex_ironman_triathlon_watch.pdfIn PDF document text
    • http://rowavironipomiz.epizy.com/adaptation_in_grassland_plants_information.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/salesforce_admin_certification_questions_and_answers_2017.pdfIn PDF document text
    • http://doroxokile.epizy.com/gideon_s_trumpet_book_report.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_off0000e0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E8 5732 bytes
SHA-256: 34ea412f293d467faeab02e9ed7e037bdc3cf14919fa0eb2522510cbcd0f7157
font_01_sfnt_off0000f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 10196 bytes
SHA-256: d9582bb55f95d3f42dc7d0af8bf8c068eda76121d4b2461180a73d267b7d9867

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