Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff7357c480aad1d…

MALICIOUS

PDF

111.3 KB Created: 2021-02-19 06:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 277cad73e30574d7d3121cb2a9984c2b SHA-1: 629ba17fd45400eaa3606a5f97f2f851c6f38beb SHA-256: 8ff7357c480aad1d28e8bf9e4f9291fdcdf76becfe0bb35c40521c8e36891d48
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with one specifically pointing to a domain associated with phishing activity. The PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=graphic+novels+for+8-9+year+olds PDF link annotation
    • https://cdn.sqhk.co/fuwunikuneg/cMicgca/bike_racing_3d_game_download_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503309/normal_5fdc9fc49ebba.pdfIn PDF document text
    • https://vuwibisi.weebly.com/uploads/1/3/1/8/131856279/8693373.pdfIn PDF document text
    • http://lozaratoz.iblogger.org/t_fal_deep_fryer_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/cFheXWX/97760135217.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/cff09ed0cdb01.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/c7ruBia/ketutogenimezawaziva.pdfIn PDF document text
    • https://xalifabosivibu.weebly.com/uploads/1/3/0/7/130775217/4210123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5fe4a507ba06e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00017670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17670 5820 bytes
SHA-256: 498df14a829e111e55bb93d2e05adc8c077ca1e893bc260291f1aee99279d61f
font_01_sfnt_off00018a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A4B 11316 bytes
SHA-256: d2b5d11cf0e1b95dae9b30ed1bee0f1e7e54f760ad016ad7b40fad599d0759a7

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