Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ad1077f9a54d02…

MALICIOUS

PDF

68.6 KB Created: 2021-01-01 12:45:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: dbfb6b364ffcaf66803d5d31f8506927 SHA-1: ef261be900ca3caff75efcb1f38f994c131fbeb7 SHA-256: 05ad1077f9a54d028c1f37d6b770dd4fb1a746bc087f663cefcf3b3fdad3bd5f
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. The embedded URL `https://cctraff.ru/strik?utm_term=ball+maze+3d` is identified as a malicious redirector, likely leading to a phishing or malware distribution site. The ClamAV detection further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=ball+maze+3d In PDF document text
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fe076511d890.pdfIn PDF document text
    • https://cdn.sqhk.co/vukobefebu/C7iaBbs/pudenenumazexofomodaru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470222/normal_5fd8fd2bdaf52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f9671c4a40c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_5fa08dcbeb8be.pdfIn PDF document text
    • https://wipedevibenisi.weebly.com/uploads/1/3/5/3/135315865/jivetamezataz_xixuwa_deseboduko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bc1e98bd-0447-4591-ba80-9625e687d668/glass_houses_free_read.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/piwitubefefazunerozora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3963adf8-00df-47f6-9b54-433b85b8c052/64529089018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4ffd6c-aec8-4edd-81b0-f92acd78280a/48106295673.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/51679028003.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC479 4404 bytes
SHA-256: 9cdaddfecbf63cb509f06920f48be836ed31cf594e5fe17a897dc0dea38f8fe0
font_01_sfnt_off0000d36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36D 10652 bytes
SHA-256: 5cf33ce40b806121537461801f1471530c05a220e9542b0764fb1553eab3b498
font_02_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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