Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d55c824d141804f…

MALICIOUS

PDF

80.0 KB Created: 2021-04-11 08:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 005b195143c24f22b6fef71cc350ab3f SHA-1: 9b732b6bbbef27da4a010fe5e92af2a9ec3b6f79 SHA-256: 0d55c824d141804fbec3f82a7bf118440c6657ee9aad4a8b3a858afd8d286a4f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to number charts, which is a common tactic for phishing or malware distribution.

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://vilenefex.ru/strik?utm_term=1+to+1000+number+chart+in+words PDF link annotation
    • http://afterdealer.pro/zenevadu626ft.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/ethiopian_grade_11_chemistry_student_textbook.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/66941756010.pdfIn PDF document text
    • http://bopugafuwu.scienceontheweb.net/xikixezodavurop.pdfIn PDF document text
    • http://klyshsheff.xyz/75760632119o1ztf.pdfIn PDF document text
    • http://parovosi.mygamesonline.org/hoover_steam_cleaner_replacement_pads.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/80442486926.pdfIn PDF document text
    • http://larumutul.getenjoyment.net/b._pharm_syllabus_2020.pdfIn PDF document text
    • http://kunutudusoxa.mywebcommunity.org/webasto_standheizung_ersatzteile.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/gidibesuxi/52_week_money_challenge_2021_philippines.pdfIn PDF document text
    • http://muwaziri.epizy.com/watermark_in_excel_spreadsheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/malachite_green_formalin.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/are_1982_pennies_valuable.pdfIn PDF document text
    • http://nusilemil.epizy.com/dell_xps_420_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/brotes_de_alfalfa_informacion_nutricional.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/cover_letter_marketing_template.pdfIn PDF document text
    • http://sibuxolubi.epizy.com/57660055257.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/75782863928.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/50_shades_of_gray_2_summary.pdfIn PDF document text
    • http://zadiriza.rf.gd/logique_argumentative.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/nevunena.pdfIn PDF document text
    • http://mebupeb.rf.gd/carta_de_apresentao_de_empresa_para_empresa.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/52725683569.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/bissell_powerforce_compact_vacuum_filters.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/pelezugubawituzepuwazab.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_off0000f7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 5480 bytes
SHA-256: 75dec6fd4e3c3012fec84ed7d4e3211473ffd9700d28ae5585149d3e5a9b1997
font_01_sfnt_off00010a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3D 12300 bytes
SHA-256: 1504cdbd9dfbcf1d2c558362d824316e6785957cd56e0ef3273762c05f5fb853

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