Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c137c9abb9bb866…

MALICIOUS

PDF

80.3 KB Created: 2021-03-24 01:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 73e41a6ab3eb9c87bb74ad8d83d9ccdf SHA-1: 5816dd901bfff477075ffb7e0442ce8516d69397 SHA-256: 6c137c9abb9bb86660451a14805b8275bce00d2b4459f1c9b0168ca8e8f9461d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The document body, though heavily obfuscated, suggests a lure related to a 'gentleman's guide to getting lucky'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://botokaw.ru/123?utm_term=gentleman%2527+s+guide+to+getting+lucky PDF link annotation
    • https://cdn.sqhk.co/bipufawawi/chhguhi/word_nut_game_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/tazewupo/fs26nie/novo_cinemas_ibn_battuta_mall_contact.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fd8b4c290865.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/idoidTd/59886669141.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402504/normal_5fcae86c9ca23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_6054cf558bdb7.pdfIn PDF document text
    • http://visionnew.xyz/oscar_wao_chapter_4_summaryglz6h.pdfIn PDF document text
    • http://geleostone.online/remodifaduibz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486041/normal_60566f2214c84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_6030d361c960b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_6011ee684c93e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5ff9356ced9b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_60208744aadbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_60393814067cc.pdfIn PDF document text
    • http://sokolov.fun/brandywine_river_museum_trainsq5ld1.pdfIn PDF document text
    • http://dvertsoff.ru/sample_nonprofit_marketing_plan_templatetqjdv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425772/normal_600c4bbfbb679.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/hdhciiF/9837468718.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/4iahchc/25399635698.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/pema_chodron_livros1tttn.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/ganubifirigevi/3981136911.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/zefudusanazixufanexigub.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/auditing_and_assurance_icai.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/56184020072.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/11732031214.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/powerpoint_jigsaw_puzzle_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/how_to_put_maytag_washer_in_diagnostic_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/roland_tr_808_vst_free_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/jaxivumibonukorija.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_off0000f7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D9 5396 bytes
SHA-256: 8b42239815a424c6ba5a67ec491e27d4c8f7ba5eae4bed7bfff600d713085f5a
font_01_sfnt_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 13712 bytes
SHA-256: 2adffccb4980302a22da7a7aa84aff60bfc8adc6351e67c149082bc654708c87

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