Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f69dda76a0259f…

MALICIOUS

PDF

73.0 KB Created: 2021-02-24 14:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 665d5f8130c0910801bbc07fbf48c810 SHA-1: be6c5edbcfdd64853016c91d3b2b5aec414e61d4 SHA-256: a7f69dda76a0259f7a890a861511c861290e22c7885c4efee48065305c38b2ef
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://jacksth.ru/wix?keyword=respiratory+crossword+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/xixujipum/Rvcie6D/smart_manager_for_samsung.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365635/normal_5fc6dfa48b4a2.pdfIn PDF document text
    • https://cdn.sqhk.co/lukapokobejo/ZjiCLkz/sigisesokatumunax.pdfIn PDF document text
    • http://arendaavto.taxi/japetazeserokibovusemipj7ch1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_600aa1748796e.pdfIn PDF document text
    • http://zuvels.xyz/33235260428v1qac.pdfIn PDF document text
    • http://logoped-samara.ru/xamoxujaxaxdvx.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/MPcqjaU/7878611151.pdfIn PDF document text
    • http://namedaun.fun/sharper_image_bluetooth_headphones_not_connectingw9b2o.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/wxgcBhe/dragon_s_lair_arcade_game_free_download.pdfIn PDF document text
    • https://vinaxana.weebly.com/uploads/1/3/4/7/134725794/3514295.pdfIn PDF document text
    • https://tupalomixesitet.weebly.com/uploads/1/3/1/3/131379559/gilesupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_60143091e0607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_5fe96301eb14d.pdfIn PDF document text
    • http://yourlivehelp.com/consecuencias_de_malos_habitos_alimenticiostuzeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5fdb6c21969c9.pdfIn PDF document text
    • https://bodakipufasedoj.weebly.com/uploads/1/3/5/9/135972884/c27aea.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/wulotugadag/wibagobirelurupi.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/bink_s_sake_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/xadivasuned.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/19799066994.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_off0000dfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEE 5396 bytes
SHA-256: 9c21e895eafabecaf7edf21c9c2a8912a4c1221e2ba8e7ec99d2cd974ba77cd9
font_01_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 10472 bytes
SHA-256: e74b9d36f3fe98fb65016a48fd48ab6e5214a8f6d278a2e53c9c5569c1400544

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