Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d48ff99c27e8b7…

MALICIOUS

PDF

174.8 KB Created: 2021-03-13 13:15:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8b2d7ecce27f524ab9890b80ec6e5efd SHA-1: d80788f372e1c0d2aa6b047c5e67d87903af4528 SHA-256: d8d48ff99c27e8b703d85587d7b6490d275d46a1b5570318dce0118955c68ab5
112 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'xajibur.ru', which is likely a malicious domain used to host or redirect to a secondary payload. The document body, though heavily obfuscated, suggests a lure related to legal documents, combined with heuristic findings of urgency and invoice lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/award?keyword=memorandum+and+articles+of+association+sample+pdf PDF link annotation
    • https://cdn.sqhk.co/goronikel/hghXjhH/89947225325.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501993/normal_5ff7d5ba5c929.pdfIn PDF document text
    • https://cdn.sqhk.co/poxedomeke/EBjdReA/tumilori.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/y1jh9ym/xuzexukutewasenedonelujer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5ff4c455d05ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372983/normal_5ff6815d029aa.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/hjbThfB/happy_glass_game_online.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/mukut/kixegubevufeg.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/21503623623.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/sufenezidewagiwalekegejo.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/jabadamub.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/zudar.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/aune_t1se_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/english_words_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/535f09c1-c804-4d0a-8e20-3c4095659fa4/14291493002.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/bugitowolazixaperevirobel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f51abae-7bcd-4226-bb73-837d4d462123/22536510488.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/thirteen_reasons_why__jay_asher_books.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/attachment_report_for_hospitality_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c988b24-c645-43b6-8753-5f082325b962/29610535603.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/install_cydia_app_manually.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/mulizobazototerurunipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a9b6fa-03d6-450f-b73b-ba2512bff155/oster_turbo_a5_parts.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_off00027514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27514 5304 bytes
SHA-256: 5123bf49eb4162c777d1f505a0de048ed4dce94c614fd0027e0794f884dae52b
font_01_sfnt_off00028710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28710 11060 bytes
SHA-256: 7c513403c90748a889e765327de49dacef0d55ddda2a515b7da19f64e5d6c503

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