Malicious PDF — malware analysis report

Static analysis result for SHA-256 0817bda31c8fefcf…

MALICIOUS

PDF

83.3 KB Created: 2021-02-02 14:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 26d80d0051458e2f62047815fc8d1187 SHA-1: db5f2578e8186fc5da744923d454b31d944b4b33 SHA-256: 0817bda31c8fefcf504a147131b50fd4fcbd9513303b115801dcd5c75df259f2
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, with a specific detection name indicating it's a phishing trojan. It contains an embedded URL pointing to a domain that appears to be part of a lure, disguised as a tourism map. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious resource, likely for further exploitation or credential harvesting.

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://leonvi.ru/wb?keyword=bucharest%20tourism%20map%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452217/normal_5fed8e9290d4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422161/normal_5fcc920ef1a88.pdfIn PDF document text
    • http://kopolebukerone.iblogger.org/jetusigulepevupifij.pdfIn PDF document text
    • http://fexodubavilukub.22web.org/vovux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5ff927190e958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453914/normal_5fd88a608f306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_5fd1f47c91345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369152/normal_6007fd4b46940.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410694/normal_5feede78e2c51.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/xulepiwa/48389038538.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/sopizuxuvunasakan.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/teniregusanetijukegegon.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/ranudoxeluxabinisoxas.pdfIn PDF document text
    • http://rifukaleriduji.rf.gd/apprendre_le_piano_gospel.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/luguvenowegusukeziridiz.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/biladaxoxedamelusiwud.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/can_you_highlight_duplicates_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/forex_trading_journal_spreadsheet_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/glass_painting_templates.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_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 5412 bytes
SHA-256: 42a8a0788df9db3822a6293b7557eba6eee18c5760825b37c9c79118146ec329
font_01_sfnt_off00011968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11968 11660 bytes
SHA-256: 50e0e89086b5ebf153335e5a14166d0fdec21cc8e77802cc850bd9f8fc03bddb

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