Malicious PDF — malware analysis report

Static analysis result for SHA-256 752596f0de174647…

MALICIOUS

PDF

91.5 KB Created: 2021-03-12 04:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3952f48422162c0315a9587de14cb2ac SHA-1: 9a8c9582b6148024f44bf80953e6b25ffdc7162b SHA-256: 752596f0de1746472cf919f27182386aa112b91f7835d8441337fcf59386633c
104 Risk Score

Malware Insights

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

The PDF document contains a lure related to activating Windows 10, coupled with an embedded URI pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to the lure and the authoring application.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/award?keyword=how+to+activate+windows+10+without+product+key+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454163/normal_60431a62df550.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448113/normal_600136537ece7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387035/normal_5fc95dbf08c61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_603585f241dbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff947866-de47-42ee-9f8a-7f5c56e306c9/serato_dj_pro_upgrade_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/chsl_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/ipad_mini_2_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/bhagavad_geeta_in_marathi_with_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85ae5ee-b950-4350-8334-972e27c0398c/76988699827.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/65602942078.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/national_lottery_results_checker_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac0ce29-900c-4803-9eae-5ca8e677cf92/40820828208.pdfIn PDF document text
    • http://tevizowubutek.rf.gd/7065481484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc23f357-d5cb-4e7d-9f55-17ca243add44/kitomud.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/tintin_books_reading_order.pdfIn PDF document text
    • http://lixoledu.rf.gd/building_log_splitter_wedge.pdfIn PDF document text
    • http://puwivovenot.epizy.com/39923189353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de66f65-1534-4ea7-b9d9-f6be2c62ba55/chess_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/bade_bade_velly_song.pdfIn PDF document text
    • http://megegadimopef.rf.gd/77469528070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7373fa32-25e8-4612-b9c4-687346de11b7/20416993335.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/bteup_final_marksheet_2018.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_off000129b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B5 5684 bytes
SHA-256: c3657d5b602121f7f0e2bf0ac36c910cf985db13829caa33572340637fc09aa1
font_01_sfnt_off00013d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2E 10196 bytes
SHA-256: 0934a62fd44c65f45079080a5102d399474c9362ee7aa969584c03c4d734a690

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