Malicious PDF — malware analysis report

Static analysis result for SHA-256 0631ecfefbc840e8…

MALICIOUS

PDF

90.3 KB Created: 2021-03-30 22:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 77b6be440dace24ac922709410ae5cbd SHA-1: b176a19cb65c33c38bf97c01767fd18b2ec669d9 SHA-256: 0631ecfefbc840e8988498850bf0157dac0c93d4b7936a390cf7da89d6fae82b
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=eenadu+epaper+sunday+book+pdf+free+download PDF link annotation
    • http://yatvoyya.fun/sharepoint_online_end_user_guideqkwbc.pdfIn PDF document text
    • http://nozatisesufi.scienceontheweb.net/vajamagipenegutamumu.pdfIn PDF document text
    • http://zifeladawu.scienceontheweb.net/10230075613.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/mecanica_vectorial_para_ingenieros_estatica_10_edicion_beer_espaol.pdfIn PDF document text
    • http://mokenolovulonom.medianewsonline.com/synonyms_and_antonyms_file.pdfIn PDF document text
    • http://fafabil.getenjoyment.net/cfop_method_algorithms.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/marlin_60_22lr_canada.pdfIn PDF document text
    • http://sreda.city/expository_graphic_organizer_2nd_grade6o39x.pdfIn PDF document text
    • http://wofefudolojet.mywebcommunity.org/autocad_tutorial_in_bengali.pdfIn PDF document text
    • http://sluzhba1.net/mobudapiipg.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/gadotobatupilupux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/jikopot/cruise_ship_accident_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/best_ecg_book_for_beginners.pdfIn PDF document text
    • http://nekelaxowe.atwebpages.com/brche_dividieren_bungen.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/giant_steps_lead_sheet_bb.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/chain_reaction_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/beditoxulefutaka.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/35733409294.pdfIn PDF document text
    • http://lamupimifuban.onlinewebshop.net/sales_action_plan_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/49784050575.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/72457627189.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 5388 bytes
SHA-256: 357e7caf624483ffef3e71080bc6532d4117841e3918d0620d5df6d4d5c5c68f
font_01_sfnt_off00010421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 22496 bytes
SHA-256: c89c6b3def7eb68739205f46dfa882006cccab12ff147c4389fbbb23fc7eec41
font_02_sfnt_off000136fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FE 10704 bytes
SHA-256: e0c4464b6a0642c678e5b4f779e80c4d7dd0b866998309adeca9feb04440705f

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