Malicious PDF — malware analysis report

Static analysis result for SHA-256 3655e796c1c6bf80…

MALICIOUS

PDF

67.5 KB Created: 2021-02-07 12:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eaa0ed9c28b671e2c1e29a7849adc659 SHA-1: 6337a8ad2c4d74758db7cfd7b543d3e46095d6c2 SHA-256: 3655e796c1c6bf80ba44f3d457fed55977695f4d93287d17de1d206285e4b88f
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/wb?keyword=relative%20dating%20worksheet%20answer%20key PDF link annotation
    • https://cdn.sqhk.co/vimibaja/fRtbhaW/table_tennis_3d_live_ping_pong_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lilovenodi/bjanjab/daily_deals_food_outlet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5ff80199c65d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490244/normal_60111d6bb5b70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476274/normal_60070d4de3df9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488815/normal_5fc730d32c6f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_5fdbb7c5162ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_6019f219984b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_5fe6b3f87b995.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/lukepepe/76171242464.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/mathemagic_assessment_test_6_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/electro_galvanized_sheet_steel.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/penokikuloxinuvumigamom.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/55301520473.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/giberelinas_en_plantas.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/fugezabunofafemav.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/absorption_costing_and_activity_based_costing.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/directed_reading_identifying_minerals_answer_key.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_off0000cbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCA 5412 bytes
SHA-256: e2ac12694bf75af1200803e4393081825191542a7cf6e336e010a47eaaafd14e
font_01_sfnt_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 10160 bytes
SHA-256: 6775b2f2aae9a759f06bbeff51de34a43fec830bb4394b651f053b5df275fcfa