Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdecc22f677880b9…

MALICIOUS

PDF

73.6 KB Created: 2021-03-01 17:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 57b735702c74a396babb14c8284e2000 SHA-1: 609bad3a0c42bbbcdec14067ab14e5d9b7e5d0d4 SHA-256: cdecc22f677880b97b06e2e746c3358da2b05aab9fcb9bd4eaf3195983606c04
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to redirect users to a network of malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=top+parkour+games+on+roblox PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386594/normal_5fc769081cdc7.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/Qg5jgtb/vofixofaragafuloxetude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_601748bc110e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5ff8c5efdc2f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481423/normal_5febcfe16df27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460063/normal_600f2229e427d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_6027a5d84a463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450034/normal_5fd889792cc81.pdfIn PDF document text
    • http://leoidet.xyz/dasatozivipmhco2.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/e2UJhaR/naguki.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/aO54Hje/pico_de_gallo_restaurant_monterey.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_602ede8de061b.pdfIn PDF document text
    • https://cdn.sqhk.co/sadinuko/5gjaZm2/world_leaders_list_history.pdfIn PDF document text
    • https://kujugozu.weebly.com/uploads/1/3/4/6/134660126/f076259ab03e2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_600b6dadb1b3e.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/ajiZBjd/best_craft_furniture.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_60019c6feb2fc.pdfIn PDF document text
    • http://trenolgia.buzz/google_forms_in_sheets655sx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 5360 bytes
SHA-256: 8aa37a6bfce78ec02cea028f627c5edbd6d9bb8640b3b2836b119b9d21b87241
font_01_sfnt_off0000f683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF683 10244 bytes
SHA-256: 12346bc78479ed83fb26422a180fbcef01bf3750f1b61a8c2189b1f08d231409

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