Malicious PDF — malware analysis report

Static analysis result for SHA-256 47857ab2ccd78631…

MALICIOUS

PDF

77.7 KB Created: 2021-03-16 22:11:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6fb4e7afa06b00a3adb0517e8ab9a952 SHA-1: 801c3a3a1fb3726ec3eac1ec4c562a3cbf8904ed SHA-256: 47857ab2ccd78631757175832e7248b78b1b8366f8700c481360dd0497b5d02b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a heuristic indicating an external URI. The document body, though heavily obfuscated, contains text related to 'Upsc zoology syllabus 2020 pdf', suggesting a lure. The embedded URL points to a domain associated with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=upsc+zoology+syllabus+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/farafakilof/Ohenibj/budweiser_frog_glasses_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/skjgHL2/flappy_dunk_play_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/gavhghd/supertuxkart_multiplayer_bots.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/dgegjie/guzizutewalorasep.pdfIn PDF document text
    • https://cdn.sqhk.co/peretudiwi/OZEDIje/dining_room_or_there_is_nothing.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/pnpjaie/call_of_duty_cold_war_leaked_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/kubemuzu/Ok8icjb/10597087922.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/chc0gfZ/40743917721.pdfIn PDF document text
    • https://cdn.sqhk.co/monubinejon/oJGhdYh/fadedogob.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/hiio6ss/18872759938.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/hjgYgif/reports_followers_analytics_for_instagram_apk.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/67b18200-7207-41b0-80b1-884c52bb2bcb/engenius_eap600_repeater_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603c9526-a0e7-4125-a129-4ead05d7404a/4_pics_mystery_level_5_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc941116-c710-4c78-a201-a87481c52e72/xfinity_cable_box_not_working_after_power_outage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80aa99b0-e34e-4035-91ec-dbf8901a3161/general_chemistry_principles_and_modern_applications_10th_edition_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085e45a7-b668-46cc-bd2d-f750cb131663/dd_5e_players_handbook_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2708ed6-b3da-4c29-94fe-1a5242a6ff4e/how_to_reset_water_softener_regeneration_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a799b2-e0ca-4473-b30a-3d9bfdf8be6b/winchester_shotshell_reloading_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a32b0d-87f9-457a-b4f9-e3cd0d3bd068/kutufazep.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_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 5784 bytes
SHA-256: 12817fb169f32d6c4f4b694f8b543b6ee6b35c9882b3953d9f51d07608aeada6
font_01_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 10336 bytes
SHA-256: 033777768f70e086e50edaa6b0e54113c19c8754b6988717324ad3508e21d132

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