Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b8c9d708e28107…

MALICIOUS

PDF

105.2 KB Created: 2021-03-27 16:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f9846adfe604d2da7b9be373b26462ff SHA-1: 48fa352adbb7ebf4c9380d4af664e03cde8f170f SHA-256: 62b8c9d708e281078873722fffa482bb57e645ef45b1476cb343be440d948112
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host a phishing page or deliver a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to a seminar.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/award?keyword=seminario+de+cultura+regional+chihuahua+pdf PDF link annotation
    • https://cdn.sqhk.co/takivelalam/xeJCDii/brain_test_tricky_puzzles_level_142.pdfIn PDF document text
    • http://app-3null.com/91407748615o91am.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/agfr2Gg/swat_team_uniform_colors.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/Ghg5Tij/mugen_games_free_pc.pdfIn PDF document text
    • http://civiliscmq.online/how_many_carbs_in_sonic_chili_cheese_totslybfa.pdfIn PDF document text
    • https://cdn.sqhk.co/jajotulix/gpkDZij/8404028252.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/SzjbvBv/cisco_webex_meeting_online_classes.pdfIn PDF document text
    • http://whalesqpa.fun/panofav5oefk.pdfIn PDF document text
    • http://kellys.space/95873264473mkidh.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/tizowodifi/b_ed_admission_form_2019_last_date.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/intro_to_java_programming_daniel_liang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8493a157-1526-4e64-8ac8-4eb3b60fc96b/xfinity_dvr_box_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d16a78-e625-429c-8224-ec1bb155877d/22178786310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83286b1f-a206-4469-bd57-947a9deacd08/bose_321_series_ii_remote_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820eb849-41fa-4113-9da7-bcf5de07a82b/how_to_write_a_narrative_thesis_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/gadifalesetolo.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/bazaar_kannada_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/84753848430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df6af359-9a5d-4956-a960-44fb4483e380/how_to_reset_hisense_portable_air_conditioner.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/college_checklist_for_seniors_in_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17357fed-d11d-4aa3-abd1-e463b39ccbf5/officejet_6700_printer_cartridges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82208a4f-ffea-4ed2-8858-c6e31530a028/buviniw.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/angularjs_templateurl_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a961f7-50d9-4fd8-8c0f-afad0305c262/voviragadikonugeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f5b35e3-ebc9-4ccf-a339-663b592e5344/97810400194.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_off000154e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154E9 5496 bytes
SHA-256: 95396aef7ca08dcd526aef1a75d5b21004af94d21ec2dadd3d6c9cbb77e7c865
font_01_sfnt_off0001676a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1676A 14300 bytes
SHA-256: 3b89e780e4d666ef9b6f0a2ae3138a01da4e7160079d166fe986b5c19ae9b52e

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