Malicious PDF — malware analysis report

Static analysis result for SHA-256 36bb793ceb5466c1…

MALICIOUS

PDF

75.9 KB Created: 2020-12-20 01:35:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c9c4a3957cb8a9e099c381292eb3b52d SHA-1: d5f92d6b4785da50144bd6fd9870334f68d27d08 SHA-256: 36bb793ceb5466c103d58d3b79ca00bef8bc8fcab81594deecc3c4615a6e5511
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is https://ggtraff.ru/strik?utm_term=can+you+negotiate+with+carvana. While the document body is heavily obfuscated, the presence of a malicious redirector strongly suggests a phishing or malware delivery attempt, aligning with the 'Pdf.Phishing.Trojan' ClamAV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ggtraff.ru/strik?utm_term=can+you+negotiate+with+carvana In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5fb273f7660d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_5fac047c7cf3e.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/rimadefule/69275501784.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/duzifezidofufenizo.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/6068831032.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd37006394b41d6424d862/t/5fde521142c0045a33f71a7b/1608405527943/88169447859.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/millionaire_tax_strategies_for_real_estate_investors.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/anexos_embrionarios_humanos_e_suas_funoes.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/45136882432.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_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 5008 bytes
SHA-256: 21206dca48092cb5233a7862dd4f45bff8d501b9d25b023ee41e9d12b8231834
font_01_sfnt_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 11676 bytes
SHA-256: bc69232d0e9a7755d519cefaeeb8714838d7614d2c4a925e1de4eea8b551fa13

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