Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c96a9d03e02d0a…

MALICIOUS

PDF

88.7 KB Created: 2021-04-02 10:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9af8eff05f8b420026ad16ed4ae9422e SHA-1: ef2c2689c6c254f86bcf801b561110c4a3011872 SHA-256: 20c96a9d03e02d0a7502e618714014f4347555662d6f44b97127aaeb9da0a0c1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a site offering 'net design patterns interview questions and answers pdf'. This suggests a phishing or social engineering attempt to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=net+design+patterns+interview+questions+and+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/bumigorawi/fjaic9W/akasa_singh_video_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/chhvAYT/graphic_organizer_web.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/wunenodujeritubuvajiw.pdfIn PDF document text
    • http://bitejodimoni.iblogger.org/oblivion_sheet_music_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/mijuzojo/iifrwic/23964545838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501374/normal_6034db8bad3cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_604cc5febbc14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5fddcd51e384b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuzotulerijenej.rf.gd/joseranudari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c2736d-7e2a-4e25-9491-bcd811f2f1c8/honeywell_surround_heat_stopped_working.pdfIn PDF document text
    • http://bexadujozopu.epizy.com/dibifasijurelowigujar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59c58e4-a2d9-414b-9347-e0f64505eb2f/7852109733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0231fc8-fd0d-4a18-a8fa-2f4ee2bdcc2a/nuxofot.pdfIn PDF document text
    • http://josuxak.atwebpages.com/ejercicios_para_nombrar_alcanos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbde638-9843-47c1-86e3-1abbb97ee28e/tokyo_ghoul_manga_order.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/what_do_millionaires_think_about_poverty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a9eef0-95c2-4b0d-8e15-06d036ca13ec/mind_power_subliminal_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a13e5b2-cf56-4c5e-8cc7-715398c29448/87183478579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0bfa3b-f616-4f7f-b639-5b76ae1a5bc5/45475157445.pdfIn PDF document text
    • http://rabopakuzu.epizy.com/85292454397.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_off0001169a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169A 5424 bytes
SHA-256: 2ccc910529d8f8cd114aea381043d62c9e50c6147d34dadd47ed9770aacee398
font_01_sfnt_off00012934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12934 13184 bytes
SHA-256: 9ed371cb33b93c059864fef42ca7c7455e33b9a5893fa649d3c778eaaff08d37

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