Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f49d6735ca08223…

MALICIOUS

PDF

37.8 KB Created: 2020-11-07 18:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c560eea65beb7a4069c6c4774a5ba22e SHA-1: ddc55087fe59bb9cfc4e84f0588acaa8ec369fef SHA-256: 8f49d6735ca08223de0a10c38d8f6f780b9ebb6f6557d2cd110bbb31ee280f93
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/wb?keyword=algebra%201%20common%20core%20pearson%20answer%20key PDF link annotation
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/waxagitor_morasugifujawi_lujinepowop_guguwegifedurol.pdfIn PDF document text
    • https://bawokotofebadu.weebly.com/uploads/1/3/4/5/134507933/xuvafutobimiw.pdfIn PDF document text
    • https://pafasuletelaw.weebly.com/uploads/1/3/4/4/134447528/ef100f7fba.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/pukamegipugav.pdfIn PDF document text
    • https://dewubonate.weebly.com/uploads/1/3/4/4/134466502/bovikaj_zadixo_lutidida.pdfIn PDF document text
    • https://rusezoxebob.weebly.com/uploads/1/3/4/3/134355184/4518565.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/6451069.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/sezexo_baboxixofe_dafuxorufow.pdfIn PDF document text
    • https://pudarafuweza.weebly.com/uploads/1/3/4/4/134479559/nejisuxipomet-mofevojow-wobegaba-kosulen.pdfIn PDF document text
    • https://xexofomes.weebly.com/uploads/1/3/4/4/134489610/lonar_lolozaw_wugaketizamo_begozemomofawad.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/balatifi-birit.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/379582.pdfIn PDF document text
    • https://bonunobomatujo.weebly.com/uploads/1/3/4/3/134318799/1d9ed86cb6b7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8adb518-28bf-4c9e-9f44-0275cd286b97/80725404052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6541b943-67b4-416d-b57a-3bca59fc3c29/64317998456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5319b356-492d-4b81-aa46-5118ec5ae0c6/fallen_angels_download.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_off0000560f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x560F 5692 bytes
SHA-256: 713ba855e6a4ac1f4a351249f0eecd805f519f4af7357f39359def690bebfc98
font_01_sfnt_off00006982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6982 9572 bytes
SHA-256: 37b47f122c14311a394d4e824248dbef5bf8345d2090c33ea4f06e808997b8f2

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