Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a78dcf24953994e…

MALICIOUS

PDF

72.9 KB Created: 2021-04-25 10:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4970eec87bc22324d367249f5f267676 SHA-1: e58518bf05cb67528f23b002e0bf082b5a1261b6 SHA-256: 8a78dcf24953994ea81f79bcb3e05892434a61c7e264af1db5599c2837c8a1d9
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to technical information, which is a common tactic for phishing or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=how+to+tell+if+motor+is+running+lean PDF link annotation
    • http://aycotoro5.xyz/tokyo_ghoul_season_3_episode_1_recapkx35l.pdfIn PDF document text
    • http://vvinorama.fun/air_traffic_controller_associates_degree_onlinendvb6.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/4899686.pdfIn PDF document text
    • http://jezepepaw.22web.org/13342988253.pdfIn PDF document text
    • https://sazopugewado.weebly.com/uploads/1/3/1/4/131453094/3138685.pdfIn PDF document text
    • https://titoduxelet.weebly.com/uploads/1/3/5/3/135399046/6258537.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/fapaga/7041751628.pdfIn PDF document text
    • http://gajijiwoxaseke.epizy.com/66895350152.pdfIn PDF document text
    • http://betorigejoli.rf.gd/minimalist_business_card_template_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/gevevusutoximidatujaro.pdfIn PDF document text
    • http://vewamekigobuzuw.epizy.com/bidirectional_visitor_counter_using_arduino_report.pdfIn PDF document text
    • http://mowuxixujovaxe.rf.gd/brown_vs_topeka_board_of_education_facts.pdfIn PDF document text
    • http://kilirafesiva.epizy.com/bagapazufiwivoxuber.pdfIn PDF document text
    • http://fobiwuna.epizy.com/6014472355.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/butterfly_sewing_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/the_magic_of_believing_by_claude_m._bristol.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/off_road_trailer_plans.pdfIn PDF document text
    • http://susebuxusebug.epizy.com/faverifezedoxomafafila.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/76121054195.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/carlos_burity_nguma.pdfIn PDF document text
    • http://rusarasoliwu.rf.gd/83215845070.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_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 5140 bytes
SHA-256: f3df33046e89c1f24eeb88db32f2b994e0a849700a1c4e656a999b9b1c593832
font_01_sfnt_off0000f13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 10808 bytes
SHA-256: 5feb1b6036cb27ad93ff870d9e206d00cf8258ae1fd2621c0f03e2a59c60be4c

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