Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9e5fff7d8001fe…

MALICIOUS

PDF

68.7 KB Created: 2021-02-28 19:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c24f75527883e284571beccec54d4012 SHA-1: 46f63e1fc88a6d07f48a4a50a3b49554053c495a SHA-256: 4f9e5fff7d8001fe812742aeeb2e69116086d4698b3655a82f5bace5ef896c25
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://resalured.ru/award?keyword=hp+laserjet+1320n+wireless+setup PDF link annotation
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/sowugige-wuvak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490516/normal_5fdc8af291751.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/EGgeEjd/download_gif_live_wallpaper_pro_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529977/normal_602ad1b411511.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417807/normal_5ffa781e25159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5fd79010e9b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459631/normal_6036c40a97c76.pdfIn PDF document text
    • https://rufukowov.weebly.com/uploads/1/3/4/6/134665675/kalezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464077/normal_60384c861ec79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415935/normal_5fd7a383db339.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501961/normal_5fcd6782129d0.pdfIn PDF document text
    • https://sarerudaguf.weebly.com/uploads/1/3/4/3/134373173/sebologali.pdfIn PDF document text
    • https://xopozutafedas.weebly.com/uploads/1/3/1/4/131453480/nekogemasegizex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500425/normal_5ff255c75354f.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/wapabefizosumi/1171070664.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_off0000d099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD099 5432 bytes
SHA-256: 10d5ff1e1394c073ab2ebb4284b092e74943a2c72843d2112f700ad2e02f23b8
font_01_sfnt_off0000e332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE332 10136 bytes
SHA-256: afada0934629ac7ad3d930029c50d0eb46ee80402e5399785571407c61b0e1d7