Malicious PDF — malware analysis report

Static analysis result for SHA-256 463c23ee9231924a…

MALICIOUS

PDF

72.5 KB Created: 2021-01-25 15:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: eaa3515a05218b28521eefe44215d83b SHA-1: b555a85024c41080bff31ddd63cb4187e1c507fc SHA-256: 463c23ee9231924a50c6756b82547b0b9d6fd55de5ad4efd44467d851bc6621e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/123?utm_term=this+is+why+we+sing+by+kirk+franklin PDF link annotation
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/7666fa1a160.pdfIn PDF document text
    • http://vejefulolite.22web.org/vofemujan.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/gixaz.pdfIn PDF document text
    • https://keziputaxa.weebly.com/uploads/1/3/2/7/132711938/panakugakarifem_nebunuvibu.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/wulagisi/64836956079.pdfIn PDF document text
    • http://gefuxexo.epizy.com/bernardo_kliksberg_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/excel_macro_select_spreadsheet.pdfIn PDF document text
    • http://dutugege.epizy.com/free_responsive_html5_bootstrap_website_templates.pdfIn PDF document text
    • http://luwegovufa.epizy.com/gelatin_sheets_to_powder_grams.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/lagenodokopimuxeden.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/76248878291.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/18305773660.pdfIn PDF document text
    • http://luremugaxufarup.epizy.com/pigewobadod.pdfIn PDF document text
    • http://kijijaxozaro.epizy.com/zinedaxegojeri.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/surevubowizoz.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/maplestory_private_server_guide.pdfIn PDF document text
    • http://nawupewiviziwik.rf.gd/ritotoroxujifi.pdfIn PDF document text
    • http://tokafibalo.epizy.com/torokirimusisupijiko.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_off0000dccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCD 5376 bytes
SHA-256: c47dd6d9e7b95d6d8db88ec9217a3937d0a0a6690d074c2ce0cf47ce0b430689
font_01_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 12228 bytes
SHA-256: dc9fb7c01a12e574142ec2213edf41fb3ad39bb853ff10d0e9bf76acdc3626d9