Malicious PDF — malware analysis report

Static analysis result for SHA-256 a568ac685f791dd8…

MALICIOUS

PDF

96.0 KB Created: 2021-03-15 13:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c12e352409827479f8e77a3a6a44e82c SHA-1: c0cf5a9a2691f7e9a1dca685cd56153d56407b6a SHA-256: a568ac685f791dd8ecb1bd598c74446732a790eab33a0607bed4dae681785944
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO spam or to direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=toyota+forklift+parts+san+antonio PDF link annotation
    • https://cdn.sqhk.co/wovegase/jififUM/woodturning_3d_wood_carving.pdfIn PDF document text
    • https://cdn.sqhk.co/vorinugobol/jg9iaAp/xinukitewen.pdfIn PDF document text
    • http://lifegirls.site/42958798910dc1vv.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/hC9ngh3/criminal_case_definition_for_dummies.pdfIn PDF document text
    • http://ar-foto.art/epson_xp-200_printer_not_printingw5k1p.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzudumijamo/Iq9tggj/end_polio_now_dortmund_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rurizibaxami/eIheAib/davodomamobojorifixosu.pdfIn PDF document text
    • https://kukutapiroboj.weebly.com/uploads/1/3/4/7/134712573/2501216.pdfIn PDF document text
    • http://pesale.pro/electrical_engineer_salary_jacksonville_floridaazahs.pdfIn PDF document text
    • https://pogivigewe.weebly.com/uploads/1/3/1/4/131438874/197527.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/7jjl573/real_hospital_games_virtual_simulator_dream_doctor.pdfIn PDF document text
    • https://cdn.sqhk.co/dudazume/9jaehiP/cdf_vs_statistics.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/Cihjjgi/91489698278.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/wokesabisevo/how_to_hook_up_a_dbx_compressor.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/32876898060.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/15393923301.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/new_year_resolution_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/poetry_comprehension_worksheets_for_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/the_education_of_little_tree_rotten_tomatoes.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/back_again_song.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/work_schedule_template_excel.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_off0001383d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383D 5012 bytes
SHA-256: 71a9c5fb998cf15ed14a5619bfeacf9a55b7ea4ba6bc2d10963862fab57aa208
font_01_sfnt_off00014967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14967 12424 bytes
SHA-256: 3cfc00faf5aa856c1a6f6c10ae071716a07f487217bb9417b2750f5eadb701e6

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