Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e44702c672c888…

MALICIOUS

PDF

76.8 KB Created: 2021-01-26 09:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 11315e5fedfa131b0e119454c8a11136 SHA-1: b329d074375060be6a74408ba2392a8aef877e76 SHA-256: a0e44702c672c88856f297e0b4bedd4f88bc867840e6bb03b4d43c42fc45e139
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The document body, though heavily obfuscated, contains text related to graphing in Excel, likely a lure. A suspicious external URI, 'https://leonvi.ru/123?utm_term=como+graficar+en+excel+varios+datos', was extracted, suggesting the document's purpose is to redirect users to a potentially harmful site.

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://leonvi.ru/123?utm_term=como+graficar+en+excel+varios+datos PDF link annotation
    • https://cdn.sqhk.co/delojiwuguj/i0jfZhi/spiral_perm_rods_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/bopesajan/dhe4if2/who_wins_cash_days_on_street_outlaws_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zelagagunogo/d2ijwgh/wevesa.pdfIn PDF document text
    • https://cdn.sqhk.co/retobumoki/jie1eOf/daxojapiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/gdGKhcJ/how_do_i_make_international_calls_on_whatsapp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_5fd98bece3111.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/ghlj1PI/58931101748.pdfIn PDF document text
    • https://cdn.sqhk.co/kixowijeka/Nmifkig/zilejodevexojonudonelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486034/normal_600c6948dfb1d.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/hhggfvf/49378541045.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/iziiXjj/panis_pump_price_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/xonoguduzob/Rgjgf5i/51557184816.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubuvajaroxe.epizy.com/academic_advisement_report_queens.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/end_credits_free_template_after_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/balsa_wood_sheets_menards.pdfIn PDF document text
    • http://gevuwomomot.epizy.com/bsmrstu_admission_circular_2017-_18.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/jatubebutewame.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/93778887375.pdfIn PDF document text
    • http://zobovobewuw.epizy.com/dynamics_crm_power_pane.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_off0000ec3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 5376 bytes
SHA-256: 9e40b76045a3c109dda1185a3847bab60798e37e38df4dfc5e347f8d05008862
font_01_sfnt_off0000fe76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE76 11640 bytes
SHA-256: 512250d79e6739bd36defa576dbb2ccac38300074a3c57b22d7221a78c449a8f

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