Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b63a31e6b85667…

MALICIOUS

PDF

67.6 KB Created: 2020-11-14 17:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b29840042c501fe2cafca33f32dfe339 SHA-1: 9a1818e508eebdf1251e56adbb393e80c1d1933e SHA-256: c6b63a31e6b8566709931487348d88f946a027334b96bde0049cdcdbe61acd85
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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/123?utm_term=lake+st+george+maine In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_5fa1014d38a53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f9f21102ca3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f8ccb601f700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5f8758860b40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_5fa18f46da18d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f8a8da37052e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f9d8de2cccd3.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/f4114142-ab24-43d7-8871-9656dfc68161/71004601352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f22d6b-9f05-4724-bf3f-906c7bdc1633/captain_america_civil_war_720p_download_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/paediatric_berg_balance_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d04a3b-4bb0-4eb1-943e-b5a5aa2601b0/hamilton_beach_ice_cream_maker_manual_68220.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_off0000ca98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA98 4980 bytes
SHA-256: a0864e770639551d117a89a128a8d9e8bea2c9bb6c3ca9da903ac759de055418
font_01_sfnt_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 11328 bytes
SHA-256: d9f530d3c2d0e2a41e578841eeab346a571749840c065a7e8431e3583de452f8