Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0439a5a82ca31bf…

MALICIOUS

PDF

77.7 KB Created: 2021-03-12 00:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 60fa5b283d64163fb15cc87127c839f3 SHA-1: c6c82614f64ea227056e0429fcd02f19206db18b SHA-256: d0439a5a82ca31bf4fed55f79096d243346844d36711bc90d56bd6e875875539
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'quarantine', likely to trick users into clicking the malicious link.

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://mezovuduw.ru/wix?keyword=que+significa+cuarentena PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370542/normal_601eeb06eb3e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_6010aae83d0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_5fda546ddaa27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_6038dddf64409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_60462e5b71680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366035/normal_5ffaca3dadbd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_601d028b06532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479925/normal_5fe61f97d5440.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444853/normal_5fc6cd1c18e63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368742/normal_6000f69b5913d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5ff33de8c11d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496372/normal_600d064b73075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_602c843b5c93c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5482be0-4459-43e9-8d87-ddde3177b72d/99_names_of_allah_mp3_download_qtv.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/64066663216.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/dirty_dancing_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17fcd1c-aa88-4881-bba4-e840cee3d859/fovokivotonasogamolug.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/75523455442.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_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 5080 bytes
SHA-256: e05705038b8c3d36108a695c9300b97733467723188cc714c0c7271b94ab3083
font_01_sfnt_off00010229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10229 11700 bytes
SHA-256: 4ca269f503a059ddd6bd8c63b123f3bb90b61fb7bd254720a32d54bd4caf1959

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