Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade179b390de063e…

MALICIOUS

PDF

77.7 KB Created: 2021-02-26 23:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8081b4a3ea48a8f49a272957d5c62f2c SHA-1: 1e427085025795a9559a2814214957765b0bc11d SHA-256: ade179b390de063e6a07ec6ab947fdd3b7f7ca2829aa3046442ee206ab022a6f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to 'countries do not have a written constitution' and an embedded URI pointing to 'https://baarspo.ru/strik'. This suggests a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://baarspo.ru/strik?utm_term=which+countries+do+not+have+a+written+constitution PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457857/normal_6030ff2d19e36.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/a_dance_with_dragons_archive.pdfIn PDF document text
    • http://widuzuduzudovix.iblogger.org/i_robot_vacuum_cleaner_walmart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489730/normal_5fe39540073b1.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/xoponiwasal.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/how_spell_slots_work_5e.pdfIn PDF document text
    • http://bitopikagigev.iblogger.org/rawuju.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/annie_dillard_total_eclipse_audio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_6017447bdb8fb.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/star_citizen_ships_listed_by_cargo.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/22118716837.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/20022609918.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vixaxupofu.rf.gd/67607427980.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/adanga_maru_bgm_songs_masstamilan.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/once_minutos_libro_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/jamev.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/zoromonarivukuritorigos.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/kukosivuxej.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/indian_wooden_bed_designs_catalogue.pdfIn PDF document text
    • http://felubumasosazi.epizy.com/15635470807.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/solomon_islands_national_university_application_form_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/i_see_fire_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/clasificacion_de_excipientes_farmaceuticos.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/mimajusagowupurojuzore.pdfIn PDF document text
    • http://xasonivuk.epizy.com/input_output_function_tables_worksheet.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_off0000f297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF297 5160 bytes
SHA-256: 8923d79186c48e0d476e707c68ce80ebdc6d320f988617f3966409f2e055a6b9
font_01_sfnt_off0001043b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043B 10632 bytes
SHA-256: 591b4f35d9333c992d279944797015381d2f78b50f91a470cb48fa03471b3ba0

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