Malicious PDF — malware analysis report

Static analysis result for SHA-256 efebfcde68d9e22e…

MALICIOUS

PDF

66.3 KB Created: 2021-03-01 06:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f846dd5f2e7b839a0207519c8bcce810 SHA-1: 6cd9420f48c47fc47037c6674840f20c4f6d1baf SHA-256: efebfcde68d9e22e7e93bc2a5bc17d4950f51855037fcc2563449461f4145652
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is likely used to host a malicious payload or phishing content. The PDF structure and embedded URLs suggest it's designed to trick users into visiting a compromised site, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=fade+grips+logo+png PDF link annotation
    • https://cdn.sqhk.co/mixubiki/sjakgfD/nfl_scores_week_12_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/gjhfgcM/zimmerman_telegram_definition_ww1.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/Zhjhjjd/87269082543.pdfIn PDF document text
    • https://cdn.sqhk.co/nugutobudan/0Ramheh/29443772093.pdfIn PDF document text
    • https://cdn.sqhk.co/gasalikuviz/r3ge0gd/30321861010.pdfIn PDF document text
    • http://petrol-v-pol-price.site/chargesheet_in_498aym3k9.pdfIn PDF document text
    • https://cdn.sqhk.co/nutanujel/ietAShd/bozapegematumoxikuz.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/hji8jjn/90198906770.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/lovomijelun/android_messages_rcs_chat.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/arthur_conan_doyle_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/93943481592.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/intensive_and_reflexive_pronoun_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/amapiano_dance_moves_2019_mp4.pdfIn PDF document text
    • http://sapakebozo.rf.gd/how_to_use_heat_on_portable_air_conditioner.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_off0000c928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC928 5080 bytes
SHA-256: b6e7379c59ba5910335f8ee7d8c26502eb2f23a82c2c37b84d54102598dd1101
font_01_sfnt_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 9828 bytes
SHA-256: 71d06fc4edd7e99730c8d584ebdfc89fac81f900ab270aa60fa4aac57d58b585

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