Malicious PDF — malware analysis report

Static analysis result for SHA-256 440e0df467b600b7…

MALICIOUS

PDF

81.1 KB Created: 2021-05-07 07:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d7e211bd5232998dabfe269b9c8beaff SHA-1: a7f529d35afd6786aeeacadf1220bfacd3e76895 SHA-256: 440e0df467b600b78fcc7919e70e369f996775d33e6eba2f5b4c0539b0ed1d9f
104 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain. Heuristics indicate an urgency lure and a high ML classification score, strongly suggesting malicious intent. Although no scripts were extracted, the presence of an external URI and the urgency lure point towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/strik?utm_term=unravel+me+book+series+in+order PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407060/normal_605536642a1a4.pdfIn PDF document text
    • http://dexuposi.sportsontheweb.net/capitalismo_y_socialismo_resumen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461495/normal_6053063dd0d16.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/tipagutepibamoburinubik.pdfIn PDF document text
    • http://misifebofol.mywebcommunity.org/improvement_of_bearing_capacity_of_sandy_soil_by_grouting.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kegigija.atwebpages.com/92017715917.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/universidad_del_pacfico_carreras_y_costos.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/57043169529.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/marketing_management_kotler_download.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/credit_risk_management_lecture_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/best_weather_channel_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/18229315264.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/kivez.pdfIn PDF document text
    • http://gujugune.rf.gd/transformations_in_the_coordinate_plane_worksheet_kuta.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/zuzin.pdfIn PDF document text
    • http://fituguguras.rf.gd/vertical_and_adjacent_angles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/self_assessment_form_2015.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/67743756692.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_off0000fc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC24 5224 bytes
SHA-256: ac1710d583c73c3ae3b5bfdcfccd07f2e2864affb5012c9102e37b133068b036
font_01_sfnt_off00010dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD9 11688 bytes
SHA-256: a6543b4cb26b53ebfc3d18385cadabfbbcee40d5bcf7d7e1f5bf046beca21555

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