Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b83b4d05c83875…

MALICIOUS

PDF

75.4 KB Created: 2021-03-08 18:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e240b109ceca1691d9105b2fbd3fc4b3 SHA-1: 90c7205906925442c1834ad5896fd0f2f3030343 SHA-256: 62b83b4d05c838759157f0734b186fd9430f46a8b5fd42db09a18e99f3b35104
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs pointing to suspicious domains, indicating an attempt to redirect users to malicious websites for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=trial+balance+sheet+example+pdf PDF link annotation
    • http://kepibarufot.22web.org/lesuwevezibagi.pdfIn PDF document text
    • http://good-production17.site/gikidejurasajexajawuzivnx0bc.pdfIn PDF document text
    • http://zinalonisu.iblogger.org/biodegradation_of_organic_pollutants.pdfIn PDF document text
    • http://playmarket-online.com/what_to_avoid_on_the_dash_dietoo9up.pdfIn PDF document text
    • http://hq-cleartv.info/salary_cash_advance_formata7wo5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379718/normal_600862981cbc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_5fe7d147b1d7d.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/526303523460wj5i.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/koxujesuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_603236649f158.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/2c32925b-c33f-415c-b50f-453b48db6b0a/realtek_hd_audio_manager_driver_update.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/digital_time_worksheets_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/75831787813.pdfIn PDF document text
    • http://salajire.onlinewebshop.net/labview_core_1_2019.pdfIn PDF document text
    • http://liboditi.rf.gd/barefoot_running_form_drills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32094da6-efa2-4e88-a545-41363317b1e3/munow.pdfIn PDF document text
    • http://giramipaso.epizy.com/12728460553.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/how_to_view_speaker_notes_in_powerpoint_presentation.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/project_definition_document_template.pdfIn PDF document text
    • http://taxolume.rf.gd/lunem.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/fivikisavepunog.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_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 5552 bytes
SHA-256: 0874994753f5ffc8046baf7cf0499b3148d42553e0cceb07fb0efe3748633180
font_01_sfnt_off0000fcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 10492 bytes
SHA-256: 09fcdaab3b4a618064daef83f6f8b82327f80bb17c2620734770b769d276cf16

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