Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5eaf0d00f1ff8b…

MALICIOUS

PDF

66.2 KB Created: 2020-12-18 19:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 029b408fcc7fd9fb24db6ec5c25bc6f1 SHA-1: 085761c59558f730b6ebd1540730620b0b8b886a SHA-256: 4b5eaf0d00f1ff8b6faebd6c21ec18c6461b394eebb76dfe5766edce4dc83d8c
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ggtraff.ru, which is indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although the document body is heavily obfuscated, the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=how+does+a+computer+process+data+into+information In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5f8d384edfeee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f965095dabe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f8dcbbe73e09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402486/normal_5fc7e76812c10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5fa4f0261b755.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/df63c237-2d73-4c7a-95d7-15f5b0c73b88/viking_h10_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4041be81-bb01-4e8d-bf37-e50e144b4121/bexesajawudopadonepod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0e2a8ec-b176-4f87-aff6-523ad05a909b/nokijezukin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ce05c4-507c-4772-93ad-08ed164d0789/8372338965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab786890-6f8d-43e7-9a86-7e71341ae678/20135975463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17490f1-ed9a-4c8d-bc0e-bc2d40f5207f/69959793414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80aee464-fa23-4a14-81b5-7c9aaf224410/wasabagiletave.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_off0000c75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75C 5320 bytes
SHA-256: df8e7be75c0312fe4daad609925f6b8063fa1ee935b9f537a533ed5e95e6a0eb
font_01_sfnt_off0000d970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD970 10248 bytes
SHA-256: e7f945f7b8ada9a04b5d2082b552222084ed3199043b28cac044f62273da0055

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