Malicious PDF — malware analysis report

Static analysis result for SHA-256 c831e3a23b904a2b…

MALICIOUS

PDF

68.2 KB Created: 2021-02-26 07:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9aba80694795fa0bf8aa36de7a83bc18 SHA-1: 7405a79207222867daed5239603e90236911be44 SHA-256: c831e3a23b904a2b10cdbe4a6c1732d507f76b8e352c77c63da1c075c36fbc37
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to a 'cub cadet ltx 1040 repair manual'. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent, likely for phishing or distributing further malware.

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://jottigo.ru/strik?utm_term=cub+cadet+ltx+1040+repair+manual PDF link annotation
    • https://cdn.sqhk.co/fibapezo/SChdiXq/temple_run_3_game_ki_video.pdfIn PDF document text
    • https://cdn.sqhk.co/xiselaza/XVhhEMp/live_stream_nba_games_free_no_sign_up.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_602fa507c4b85.pdfIn PDF document text
    • http://milano-moda.space/sikojujunesoridaxh4.pdfIn PDF document text
    • https://cdn.sqhk.co/zesozote/geahdg5/25405546370.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/vRgh4jg/shoot_the_apple_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/hidQQfY/crafting_and_building_pc_games.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/ujgj5Wl/the_simpsons_tapped_out_mod_apk_old_items.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_60177a2eabbd7.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/gijjjaQ/from_sea_to_shining_sea_canada_song.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/2iiIRhi/ultimate_offroad_simulator_mod_apk_revdl.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/napejaxosinages/bimanual_serial_reaction_time_task.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/comfort_zone_infrared_heater_cz2011c_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/29559585427.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_off0000cf5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5F 5436 bytes
SHA-256: 06482b83524367662020511ff2fd156038deb44a32315efc90668298b20b1fd4
font_01_sfnt_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 9940 bytes
SHA-256: 044a66aab01e91e49bbe6bd0ffbe0ef5928555f7aa53f0380aa0d31da62b8b3b