Malicious PDF — malware analysis report

Static analysis result for SHA-256 576cc0f32aade169…

MALICIOUS

PDF

79.5 KB Created: 2021-02-25 07:16:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e7a4664661aeabd6aeda6ef21f0a2cca SHA-1: 9753caaf2e1d3293bb58c4f5b97c69d429a5b706 SHA-256: 576cc0f32aade169030a4edab2c4c6ee219e0cbfd9c15cc7fe1f39630e192aa4
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely intended to trick the user into downloading a malicious payload by masquerading as a Java learning resource. The presence of multiple external URLs further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=java+8+learn+pdf PDF link annotation
    • http://circleshtang.xyz/bcbs_appeal_form_arizonab3esu.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/hegjlgd/infection_humanity_s_last_gasp_board_game.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/fibwdjf/kazilegepasidipepuzejipa.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/hijj6Ml/kunuduzezasuvipideta.pdfIn PDF document text
    • https://cdn.sqhk.co/jepogedofuz/7jhjcyP/stack_colors_3d_tower_runner.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/tehfRge/66479648709.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/gicjhg8/dawnbringer_riven_chroma_2020.pdfIn PDF document text
    • http://reestr.site/javascript_concatenate_strings_templatey45qx.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/gP4zjhv/xetisufujut.pdfIn PDF document text
    • http://trikolor.site/929802714817d3g5.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/ogc70ge/wamerasakamudaze.pdfIn PDF document text
    • https://cdn.sqhk.co/pawapoma/jjhVRPS/buwonivupugelakibenu.pdfIn PDF document text
    • http://stixlife.info/today_rubber_sheet_rate_in_kerala6fueb.pdfIn PDF document text
    • https://cdn.sqhk.co/sowotewope/hghiimj/vojorimevanedozosatowusas.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/boduxatavepe/12089545471.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/pozebubawusajilinom.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_off0000fa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 5100 bytes
SHA-256: 8192f00f3349d66c52e1235e42acb0c3170fa9953d1333a0736a683c25c9fbe1
font_01_sfnt_off00010bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD9 10920 bytes
SHA-256: 63cd2b50010ef925ada8489065a2de0b0eac24448da9ad4b141c476d254850e3