Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbdb4c3022aa91b…

MALICIOUS

PDF

77.9 KB Created: 2021-03-18 09:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea20db1462ff24190c2dc62df283c103 SHA-1: 252919a4d8cec482fc412e4ad723d16c2ee6098a SHA-256: dbbdb4c3022aa91ba6e1b85d053030ff33afc78df7e7aa71de77887ab2603878
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware delivery attempt.

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://jacksth.ru/award?keyword=bangalore+revised+master+plan+2020+pdf
    • https://static.s123-cdn-static.com/uploads/4375885/normal_5fcc62c835c4d.pdf
    • https://cdn.sqhk.co/tuledapozato/CGShhgc/22240809705.pdf
    • https://static.s123-cdn-static.com/uploads/4481053/normal_5ff45e20d84f5.pdf
    • http://birebap.scienceontheweb.net/nikon_d5100_battery_charger_near_me.pdf
    • https://cdn.sqhk.co/xugiwatokax/mfgh5jh/38132726732.pdf
    • https://cdn.sqhk.co/tuseliwi/gdievSw/english_to_urdu_dictionary_offline_download_for_pc.pdf
    • http://zexaribamemavi.sportsontheweb.net/jamal_al_din_al_afghani.pdf
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fdc8b51f0687.pdf
    • http://vezalijoza.22web.org/nalesuzuneteruxegirubup.pdf
    • http://moxilekulina.getenjoyment.net/bhagwat_gita_in_oriya_download.pdf
    • https://cdn.sqhk.co/kidatufo/8idwWja/batatawekipefoliwe.pdf
    • http://pesugesilufafa.iblogger.org/98653728322.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_1a783bda13ed4fe0b9fb813a8200bde0.pdf?index=true
    • https://s3.amazonaws.com/feseni/genki_japanese_textbook_answers.pdf
    • https://s3.amazonaws.com/mudurixo/how_to_do_structural_analysis_in_revit.pdf
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_7812c3722ba44635a9d5874de4a46632.pdf?index=true
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_a3b094a719234725b958183ce437d016.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c3.bin
95c6c92de49be6db3c3e57132bfff0b9ac5a22c49b2ca9339ef668d076b8d6bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 5744 bytes
font_01_sfnt_off0001044d.bin
5903839f8cde13340376a0e0f4eff2a48cda4d23cfef9df33b0a46349bb1dd07
pdf-font-stream PDF embedded font (sfnt) at offset 0x1044D 11048 bytes