Malicious PDF — malware analysis report

Static analysis result for SHA-256 297fb10f3383e51e…

MALICIOUS

PDF

72.9 KB Created: 2021-04-02 16:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a78f48fb39c6cf92d5a3d5e777649997 SHA-1: b6dc91738cf2ef98dbdb7d23303df81be20f0e07 SHA-256: 297fb10f3383e51e002c371d7a41aaeaaace8b334133a40079de4915f2e1dc52
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to 'Autocad 3d building drawing exercises pdf', suggesting a phishing or social engineering attempt to redirect the user to the malicious URL. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=autocad+3d+building+drawing+exercises+pdf PDF link annotation
    • http://powajaxib.medianewsonline.com/59793038343.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381085/normal_5fe49d0bbb545.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/messages_1_workbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_6017c12da78c9.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/fujunijodogojum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_603c5bb9f248e.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/burisokaf.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/ruzumeb/vifajo.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/senior_financial_analyst_resume_template.pdfIn PDF document text
    • http://jelomasulavi.atwebpages.com/tripura_pin_code_list.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/85693344438.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/phd_dissertation_template_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/7777064729.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/5531367906.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/77848057289.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/computer_software_repair_services_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/how_much_does_cdl_school_cost_in_oklahoma.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/52651850455.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/million_billion_remix_song.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/6167298717.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/qualitative_research_design_definition_by_authors_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/price_of_new_aston_martin_dbx.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_off0000df9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9F 5776 bytes
SHA-256: b44ab66f4ec1b8f002c502fdae85e02734025730f690ec71acb5cc956ed3f493
font_01_sfnt_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 10196 bytes
SHA-256: 48dce9a6870dec3183f31dd28e35f7626ffe59976bc7e57c382448e81d09a842

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