Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f957b5dc7d5639…

MALICIOUS

PDF

63.4 KB Created: 2021-03-01 21:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 083016ec9787a8dd3b5b9c876c17304d SHA-1: a2af797f20430953566a3ebde247834bf982b1b4 SHA-256: 90f957b5dc7d5639370ff6f629785d58b05ac65d57ea594aeff659c03fb6048d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/wix?keyword=ford+stars+training+test+answers PDF link annotation
    • https://zududebagulakes.weebly.com/uploads/1/3/3/9/133997448/fafexizu.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/tiporupidawav.pdfIn PDF document text
    • https://vusexojepaxeva.weebly.com/uploads/1/3/4/0/134096357/6902906.pdfIn PDF document text
    • https://gebusoju.weebly.com/uploads/1/3/0/9/130969184/7299109.pdfIn PDF document text
    • https://totamozosapopa.weebly.com/uploads/1/3/4/7/134712517/0e9d827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fc9ef8c3f435.pdfIn PDF document text
    • https://sipusojatavajuw.weebly.com/uploads/1/3/4/6/134606658/pulusuget.pdfIn PDF document text
    • https://wivaralizufijol.weebly.com/uploads/1/3/1/4/131483386/dulazu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavisawadafo.epizy.com/banquet_table_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/antivirus_app_for_windows_7.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_off0000bf8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8F 5008 bytes
SHA-256: 450c90b7a810deff4cf697f02d9caa9e5971271a35495f5678f95d50ba9f8ee8
font_01_sfnt_off0000d0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BC 9540 bytes
SHA-256: a9f26f85482c3bc02bd97026f5b4ac61a8077648f1df3efccb6ee55875a4b904