Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a71f7f0174f66c…

MALICIOUS

PDF

74.0 KB Created: 2021-05-18 13:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 761b98b240dec49a95e0752249853c64 SHA-1: e3bc08e1560318f01015ad3253eca8d138e3ee60 SHA-256: 67a71f7f0174f66c8f25f02425a4012096e1fb0422b83f2312ca821eaa196461
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a social engineering attack.

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://ponafet.ru/strik?utm_term=how+to+deal+with+emotionally+abusive+wife PDF link annotation
    • http://kuzakub.22web.org/kawadizupunitom.pdfIn PDF document text
    • http://bowaveridageg.iblogger.org/certifier_conforme_synonymes.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/towakog/whirlpool_gold_accubake_stove_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/how_to_find_stock_option_symbols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa8d206-f32a-4642-b1fc-36d81821fa11/the_canterville_ghost_summary_chapter_wise_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831b7ff4-b999-4004-97a4-b8efeeb69975/gikebozuzoxomapajebu.pdfIn PDF document text
    • http://fuzezufomazo.rf.gd/adobe_acrobat_standard_2017_vs_pro.pdfIn PDF document text
    • http://favekagopu.epizy.com/blackberry_z10_os_10._2_autoloader.pdfIn PDF document text
    • http://jawikaginixuxuz.rf.gd/piliditosivubefozogoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/monopoly_rules_uk_auction.pdfIn PDF document text
    • http://kujinid.rf.gd/female_reproductive_system_labelling_worksheet.pdfIn PDF document text
    • http://zopimubusa.rf.gd/boy_scouts_of_america_lawsuit_lawyers.pdfIn PDF document text
    • http://ruzunol.rf.gd/43920641145.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/corporate_social_responsibility_report_nike.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/kesawuruwogutatixizorin.pdfIn PDF document text
    • http://jasagovobol.rf.gd/40835975785.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_off0000e408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE408 5404 bytes
SHA-256: 982044f89b41aa8c7c74a91230b1605e7f02b365b6f8287591bdf387ce2eb920
font_01_sfnt_off0000f65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65F 10744 bytes
SHA-256: b2e782ac2a1225cfffecde1958b9f92ea735aa8556fccb306f945fe4a9429c35

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