Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f9566722a322ff…

MALICIOUS

PDF

73.0 KB Created: 2021-02-21 17:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e6def4c85bfe99da4a24ecec38c42156 SHA-1: 2be76fe6b89aedca443c8336840c4478f82908ff SHA-256: 88f9566722a322ff5bf9e26a43df8379dbbaab2787f24915fa3aa77710d1e6b6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=black+butterfly+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376600/normal_603044da9f272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458394/normal_5fd68aca775a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483839/normal_600e9fce6df5e.pdfIn PDF document text
    • http://mainsale.info/symantec_dlp_15_oracle_installation_guidelulwr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_6011a19723740.pdfIn PDF document text
    • http://women-ita.space/420896179716yh6t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464720/normal_60286670d4997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_601c8e57a2814.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/wipotegadodorek/amazon_shopping_mall_app.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/62984979100.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/drum_kit_solo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/14434596846.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/22686959396.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/oxford_chemistry_dictionary_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/wajofogalosiwokaduwet.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/barron_s_sat_practice_test_4_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/autocad_2007_windows_10_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/letter_directionality_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/gawakono.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_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 5328 bytes
SHA-256: be643816e715dd6b4399b676f273a7ad92556b2137183dc1375a5d0c9abf68e1
font_01_sfnt_off0000f351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF351 10476 bytes
SHA-256: b52162b8b0428caa4233ce480093a7a72f32fc816a89e113daf1401087090fca