Malicious PDF — malware analysis report

Static analysis result for SHA-256 10204c17b2630e89…

MALICIOUS

PDF

76.2 KB Created: 2021-03-14 11:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4a8746552d4e623035d0b0384fc6f520 SHA-1: 9c5ccb7add7e22a92820a5c9388f0ac68c0dc4d5 SHA-256: 10204c17b2630e899a902bbda042efcf4e598f596701cf58c7830301d77a9f5f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a lure text 'Klik2 reset code' and an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of multiple unknown reputation URLs suggests a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/strik?utm_term=klik2+reset+code PDF link annotation
    • http://pedaxofanor.mywebcommunity.org/motufobebonila.pdfIn PDF document text
    • http://sks-expertiza.ru/c_type_deduction_guidesvbli3.pdfIn PDF document text
    • http://koteyarn.moscow/english_as_a_second_language_programs_near_mefmyvs.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/jE3Uhbr/warframe_defense_avionics.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/62644825291.pdfIn PDF document text
    • http://unityfree.xyz/93370519684e6gpw.pdfIn PDF document text
    • http://wanulutipumik.iblogger.org/jingle_bells_recorder_music_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/senagoxosog/OKhihgE/spirit_riding_free_theme_song.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/how_to_change_day_in_casio_g_shock.pdfIn PDF document text
    • https://cdn.sqhk.co/wanowofimaz/chgiaHk/24721948486.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/Ygecnif/easy_banana_cake_recipe_without_baking_powder.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/gijhjcJ/best_pickup_truck_2020_for_towing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dazuxujepov/can_you_apple_music_playlists.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/rectal_cancer_staging_mri_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/54123265951.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/pimipewugegesubumoka.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/what_does_it_mean_when_a_subpoena_is_returned.pdfIn PDF document text
    • http://purokazurawilew.rf.gd/petrel_seismic_interpretation.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/5_languages_of_apology_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/gesapesotinofixoxitu.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/wemuware.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/disable_bixby_button_android_pie.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/tavula.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE311 4572 bytes
SHA-256: 6936a69ac483a420c9bf6d22e63ccb9eb07b55b0cedc682438bc9c4f960ae55d
font_01_sfnt_off0000f29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 10160 bytes
SHA-256: 88a57161ea5bbcde5f19fb28a69f42b5fb095ed1b2061d670dfa2dc4ff7d1caf
font_02_sfnt_off0001156a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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