Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f681175a4a4f0d…

MALICIOUS

PDF

67.6 KB Created: 2021-03-06 01:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: aaba3837f8cf3e9283448c99be39333d SHA-1: 2510f269aa995a84f9a98b888e7552ee06f3ba3f SHA-256: 90f681175a4a4f0d88c21eaefb3c936ce164906fade1eaa772cf37399ff40ea6
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, one of which, 'https://jumiwimov.ru/strik?utm_term=bd+eclipse+needle', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the presence of external URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=bd+eclipse+needle PDF link annotation
    • http://kogutojoveso.mywebcommunity.org/zozuxazomavemanezetimal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fd3cb353e4f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5fe1a5736e09e.pdfIn PDF document text
    • http://gakukuketisalum.scienceontheweb.net/thinkorswim_mobile_options_chart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5fced1f563fee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426551/normal_5ff61412d141a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425924/normal_600883563fbd3.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/17480054531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494166/normal_5ff53255eb290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_60210dae92a56.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/vampire_diaries_season_3_episode_1_soundtrack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496828/normal_600aab6d1c771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lososimap/42055524276.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/cmie_report_upsc.pdfIn PDF document text
    • http://taberadajip.atwebpages.com/8002214773.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/18270794271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4495c41-b32a-49de-a094-52edd19c8e84/bose_acoustimass_10_series_ii_subwoofer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a1e828-128d-4e79-aac6-f85254914aee/99114236061.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/sefizaxifow.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_off0000cb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB86 4808 bytes
SHA-256: 82bf345d8ccab785b934370b662caba6fac022fa57ab9549c70b3111bd5162ae
font_01_sfnt_off0000dbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 10624 bytes
SHA-256: aba1a62b015f4f6e6400aa40c833f5d31281c23cb3148e33ece9b9847e2c1dca

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