Malicious PDF — malware analysis report

Static analysis result for SHA-256 945e9091b2e91c7a…

MALICIOUS

PDF

77.6 KB Created: 2021-03-23 08:03:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 72aaa6fab9222ee384d69b9bc315f10f SHA-1: d23f7430e043c42bb58a8c6f883efdadb069e3ab SHA-256: 945e9091b2e91c7a3f1e04008d4b911d3d2b5a424a9c4cba9ad161ea96ac4558
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'xajibur.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/strik?utm_term=what+is+analytical+chemistry+in+simple+words PDF link annotation
    • http://fufejezonodim.mywebcommunity.org/bukinabowotaxizevoxuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_602d3d91aba34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_60353537ecf20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5ff1063fdc89b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_6058d5ace8ce2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tanikanaw/61142846743.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/amazon_video_app_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/nfl_fantasy_cheat_sheet_ppr_league.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/83141327690.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/ben_hur_1959_movie_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2361bbb-1f84-496d-8036-5cdb5239c25f/tepurasi.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/numuwejexonigono.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/kijuwenudaxapokakim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e89ae7-efd7-4802-8377-ec3e3e477b63/57190686068.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/international_journal_of_applied_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/bpc_full_form_in_education.pdfIn PDF document text
    • http://nononulavojiki.myartsonline.com/mumisuseponupaj.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/cannondale_lefty_dlr_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/how_to_analyze_data_in_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/how_to_clean_rowenta_focus_1700w_iron.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/polyvore_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfab044d-b107-4738-8d6d-b5cc92011468/york_furnace_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/nolagoxekogudodopiwul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35A 5308 bytes
SHA-256: a696a99ebbec6993998fa489c82ed047865e669bb6a8b61a261024d10498a7a3
font_01_sfnt_off0000f541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF541 10952 bytes
SHA-256: 20cab6ac79317f9aeb085fd3e40d160702c900c36e7f8a5d17b61e930be11baf
font_02_sfnt_off00011abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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