Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc7e951e06e2230…

MALICIOUS

PDF

83.6 KB Created: 2021-04-03 13:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 78e2ad73a09962378ae9eb906911679b SHA-1: aacec156ee17acbd8f4e61de19c3d4e5a6997b2c SHA-256: 4dc7e951e06e2230677d2c646176e6ddc7d1ea6acd8cedfbea9e135f6294bc62
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'ponafet.ru', which is likely used for phishing or to serve a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'Capitana marvel comic 1 pdf'. No scripts were extracted, but the PDF structure itself facilitated the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/award?keyword=capitana+marvel+comic+1+pdf PDF link annotation
    • http://registrat.space/mackie_1604-vlz3_manual1j1eq.pdfIn PDF document text
    • http://itfamily.pro/best_life_simulation_games_ios_2019gggld.pdfIn PDF document text
    • http://rawenspant.online/que_es_una_sentencia_interlocutoria_en_el_juicio_de_amparok2u43.pdfIn PDF document text
    • http://chebsvet.ru/how_much_oil_does_a_2004_dodge_ram_1500_5.7_hemi_takerjtbs.pdfIn PDF document text
    • http://academic-club.ru/how_do_i_submit_an_idea_to_amazonnjt1q.pdfIn PDF document text
    • http://look-hotel.com/are_you_okay_in_spanish_formalndcbj.pdfIn PDF document text
    • http://purpless.vip/apostila_de_atualidades_para_concurso_2019sd5ds.pdfIn PDF document text
    • http://english-10.site/chrome_apk_for_android_tv_latest_versionkxctk.pdfIn PDF document text
    • http://glossywp.online/sportster_service_manualsa90n.pdfIn PDF document text
    • http://discount50.pro/137857778536bmjz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuvelerejide.rf.gd/spelling_book_6th_grade_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/gimp_brushes_free_deviantart.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/23919630043.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/amc_8_honor_roll_of_distinction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c53c11-9149-401d-acc8-787502c3fb9e/68970026754.pdfIn PDF document text
    • http://loxeputogojew.rf.gd/tewisuborewodulazebatu.pdfIn PDF document text
    • http://jilevatawew.epizy.com/couch_potato_app_android.pdfIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_3c764b2b7f4b42eb8304c8116702bb48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e00c98b-b946-4c7a-ab35-f7e49d83f46f/python_machine_learning_tutorial_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/old_school_runescape_agility_training_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b03d17f-dba4-402c-98a9-ed2fa227c988/12441036065.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/career_path_financial_reporting_analyst.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_30a8615a8dbb4c028c019428b99a996a.pdf?index=trueIn PDF document text
    • http://dewudirana.epizy.com/lepivenamebidabuxebuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23717467-a7e0-4380-b25d-ad1b8dcc1b7b/honda_gcv160_pressure_washer_2600_psi_2.3_gpm.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_off0001099b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099B 5140 bytes
SHA-256: 26e2e127c32a86a5e98b94402bf9cb83a64576f081ee8c226aa6a473e4e733fd
font_01_sfnt_off00011b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0D 11008 bytes
SHA-256: 8cf2c19063a22d54fbf059d54db46d292f62eb354b58e2ba9e5e2c42f7c56869

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