Malicious PDF — malware analysis report

Static analysis result for SHA-256 878e01961e7c58cb…

MALICIOUS

PDF

72.1 KB Created: 2021-03-10 16:24:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1fb7c3aa859bcd9cd85f74a0a3501e3 SHA-1: 2fe16cc43bfebc43f061b64fd908f9c766b1e5c7 SHA-256: 878e01961e7c58cb218d5cf3f7b33e673563abc9d24dfdef074a8168eb9a3c73
136 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, indicating a phishing or trojan threat. It contains an embedded URL that points to a suspicious domain, likely used to host a malicious payload or redirect users to a phishing site. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, potentially via embedded scripts or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://nipisod.ru/123?utm_term=s+alphabet+design+images
    • http://maxist.ru/st_thomas_aquinas_summa_theologica_pwe105.pdf
    • https://cdn.sqhk.co/xarozowuzosa/41idpgi/super_card_collection.pdf
    • https://cdn.sqhk.co/lafixafif/hfPGBRi/4x4_off_road_rally_7_mod_apk_hack.pdf
    • http://pitushok.fun/is_206220ex1.pdf
    • http://rilomenininun.getenjoyment.net/what_are_the_rules_for_the_order_of_operations.pdf
    • http://zdsshop.top/16457043065p288h.pdf
    • http://nitesufi.sportsontheweb.net/how_to_pair_jam_hang_up_bluetooth_speaker.pdf
    • http://moxupasasitote.mywebcommunity.org/c_s_lewis_books.pdf
    • http://kojazunupetip.mygamesonline.org/first_alert_carbon_monoxide_detector_expiration_date.pdf
    • http://aduo5.online/12224647370d2gxe.pdf
    • http://kojazunupetip.mygamesonline
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nitidadufetenu/bapagejesumadepalogi.pdf
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_0e604ccda0d04bbf9db1b7661c6b01d0.pdf?index=true
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_834e5bd0fe944147adf5f80352651101.pdf?index=true
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_95128666afd04c148dcdf8472812aa32.pdf?index=true
    • https://s3.amazonaws.com/zebarufuridorur/best_performing_superannuation_funds_australia.pdf
    • https://s3.amazonaws.com/zamuriza/open_excel_sheets_side_by_side.pdf
    • https://s3.amazonaws.com/zemunomipazikez/video_games_to_play_with_friends_online_free.pdf
    • https://s3.amazonaws.com/jupevuxirapi/articulacion_de_lisfranc.pdf
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_f0bd8e418591471caa30bef38e39cc04.pdf?index=true
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_66b7cb15fe3042b8863bd8a94eb55def.pdf?index=true
    • http://namakanexir.atwebpages.com/how_to_do_wave_curls_with_flat_iron.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de24.bin
6068ed7430fb59a38aeb953d29da33996af7d32feb38c6b89a57c99264c507e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE24 5520 bytes
font_01_sfnt_off0000f0b4.bin
9c988802a9825b40c6cb1aaf6314d6a567222edf9590e01dec0dbb08f4e904d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B4 10380 bytes

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