Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c58de5a9c4e28c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-17 06:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2635beebf457f3394973f3641f7bb9ca SHA-1: 91c4dc61057ec6e64dc0a6e53730963cd618825a SHA-256: 92c58de5a9c4e28cb717639a0b8607c03cc61eac6fd32174925d5e95861cee96
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that is likely part of the phishing lure, directing users to a suspicious domain. The document body, though heavily obfuscated, contains text related to 'soil and water conservation merit badge requirements', suggesting a pretext for the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/wix?keyword=soil+and+water+conservation+merit+badge+requirements
    • https://cdn.sqhk.co/xaranoraf/jmaVdha/16839257010.pdf
    • http://tatajosak.22web.org/sql_server_date_timestamp_format.pdf
    • http://nozuzatu.22web.org/causa_y_efecto_para_nios_de_inicial.pdf
    • https://cdn.sqhk.co/tatogevi/hgcBmWU/kesimisorifi.pdf
    • https://cdn.sqhk.co/xumupojamax/61Nheic/gravity_falls_season_3_comic.pdf
    • http://wifisef.medianewsonline.com/astrology_books_free_download.pdf
    • http://xovekofetovo.66ghz.com/senin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vabemavuputenif/plastic_acetate_sheets_philippines.pdf
    • https://s3.amazonaws.com/fedojigudaj/farimulozejuvabixe.pdf
    • https://s3.amazonaws.com/zafijukopa/vutovudalisumosera.pdf
    • https://s3.amazonaws.com/jadudusujuje/itemized_medical_bill_template.pdf
    • https://s3.amazonaws.com/laradusa/26428957550.pdf
    • https://s3.amazonaws.com/zemunomipazikez/4k_video_free_online.pdf
    • http://fozijasorizol.epizy.com/perakiraw.pdf
    • https://s3.amazonaws.com/boduxatavepe/free_monthly_expense_report_template.pdf
    • https://s3.amazonaws.com/tigovatolis/lysol_disinfectant_sds_sheet.pdf
    • https://s3.amazonaws.com/fowonaxul/sotexesoletaledefu.pdf
    • https://s3.amazonaws.com/dabatisew/39783830324.pdf
    • https://s3.amazonaws.com/xubifupi/9002310755.pdf
    • https://s3.amazonaws.com/boduxatavepe/military_nurse_uniform_philippines.pdf
    • https://s3.amazonaws.com/tutapaxi/indian_army_day_photos.pdf
    • http://xoxekojut.onlinewebshop.net/causes_and_consequences_of_environmental_pollution.pdf
    • https://s3.amazonaws.com/gogoxowiniza/cars_fast_as_lightning_mod_apptoko.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f090.bin
73c0db31d7dcd9774f0b7b2eec748c99f3c7bee8cb3933fbf118d899d9c46914
pdf-font-stream PDF embedded font (sfnt) at offset 0xF090 5780 bytes
font_01_sfnt_off00010431.bin
0fc4c7a1bbcc718344420db407c7d2f57f8b1282a29ada4792e85a732ce68472
pdf-font-stream PDF embedded font (sfnt) at offset 0x10431 10816 bytes