Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3143f8e13cdbfa…

MALICIOUS

PDF

77.8 KB Created: 2021-03-24 20:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2f6428553e8d25520048ebec514bc1a1 SHA-1: 19f22b1717b30dfad2afe949e20652a6bf1ff9c5 SHA-256: 0d3143f8e13cdbfa1a43f11fdd0c195b44447a081765f3e7cf2c6a952ac7a776
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. A critical heuristic indicates a 'Clipboard command execution lure,' suggesting the document instructs the user to copy and paste content into a shell, a common tactic for executing malware. The embedded URL points to a suspicious domain, likely part of the attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://druttle.ru/strik?utm_term=netgear+wnce2001+firmware PDF link annotation
    • https://cdn.sqhk.co/zekoparan/jjbgfeA/hearts_of_iron_3_vs_4.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/anthony_giddens_the_third_way.pdfIn PDF document text
    • https://cdn.sqhk.co/bebuvasipen/ijzghgP/57353010273.pdfIn PDF document text
    • https://cdn.sqhk.co/zidomirit/SkqdjaW/temitojuturavigozufa.pdfIn PDF document text
    • https://cdn.sqhk.co/xiruregexibe/gjjhghg/chesterfield_county_courts_case_information.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/mujevubutukoxu/57499608946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8967cc1c-f712-40f3-a4da-987f05c1986a/kuvevu.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/halloween_disneyland_food_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/15061464652.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/91274672713.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/articles_worksheet_for_class_5th.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/what_are_the_components_of_organizational_culture_that_affect_the_medical_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1472b69d-a92f-4f6b-b6ac-22c3ce0cbfa6/personality_plus_test_word_definitions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54781dc5-4d2a-405d-b8c5-76e4bb9cc64c/brand_identity_design_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fcf3d86-bf65-48fa-850f-4f2ce0dfde98/4_pics_1_word_answers_8_letters_teeth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be017c9b-1ac3-4f7b-9879-a55a90aa5310/jupyter_notebook_windows_file_path.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/dibujos_de_caras_de_personas_a_lapiz_faciles.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/to_prepare_his_book_report_on_the_adventures_of_tom_sawyer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc884ba8-2ad3-406f-bb49-20c5d6fc956d/hansel_and_gretel_original_story_online.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_off0000ef27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 5380 bytes
SHA-256: 91ffe7663b6c90563c844ff1fd77dd6d04e12842ede2dfdedcb624f71622ddb7
font_01_sfnt_off00010182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10182 11508 bytes
SHA-256: edd96aa0beebe28c0777c30707f4fb36e346582974ea042e02a655bd1dc68426

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