Malicious PDF — malware analysis report

Static analysis result for SHA-256 7998b56e368af886…

MALICIOUS

PDF

68.4 KB Created: 2021-02-25 06:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ec80f57d9cd124b6bfb3a6bb1da60308 SHA-1: 066cb9ee1ed335b68c6e6055755295833711e79b SHA-256: 7998b56e368af8861f07e835ca08c5105400038028bdebd497dd6caf4cb8e78d
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/award?keyword=nanostation+m2+firmware+xm.v5.5.6 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450724/normal_5fd9d35e532d9.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/gjzjdid/41418364310.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428061/normal_6003cf49dbdbc.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/31403906274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_601584193d834.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/bkXALbw/73722568933.pdfIn PDF document text
    • https://cdn.sqhk.co/bimowikosaru/azsFwgI/46914676916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_601247d1f1276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_602551a622c54.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/7Y9jiCB/agora_web_video_call_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_603123a44753b.pdfIn PDF document text
    • http://ruzoboxilotazex.22web.org/sebatoxurajojegomi.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/gOqijhc/balefo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toberijalija.rf.gd/89886776298.pdfIn PDF document text
    • http://xajalad.epizy.com/16959815462.pdfIn PDF document text
    • http://surafupomef.epizy.com/ansiedad_en_pediatria.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_off0000cd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD92 5512 bytes
SHA-256: 6b80ecfaf7cfca9340503b045b8cd4a598d9467cff9370ef1eb7167eb148492a
font_01_sfnt_off0000e06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06D 10660 bytes
SHA-256: f74bb5e164cb28301f16356b3a8aebddb3e6af63e1585f7d30ebeb0f4bc231e8