Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4cba47b237a3a1a…

MALICIOUS

PDF

72.8 KB Created: 2021-02-25 00:26:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9bcd7c2ea03877884ab290aa6258ae3a SHA-1: 78c37a784580e7f4317e2fedd8331ee0bcfe67da SHA-256: e4cba47b237a3a1a9e8ea1d7201502bfabb26a370b66702e8d60ce937777b5b9
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=treaty+of+paris+1763+worksheet+answers PDF link annotation
    • http://fanisore.sportsontheweb.net/newisit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5fe9cfe38d2dc.pdfIn PDF document text
    • http://reduslim-shop.website/cpm_diamond_problems_worksheetil9ks.pdfIn PDF document text
    • http://hookup158.fun/change_cash_app_to_personal_accountdvtpr.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/labitajaxatufib/apache_kafka.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/dinoxefijuvukem.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/begeni_paneli_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/fupatomodiganugawunu.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/95323420141.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_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 5612 bytes
SHA-256: 4a7e4d5399878d606ca980263529b851012b198dc2ba83538516b41173b0d560
font_01_sfnt_off0000f37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37D 10136 bytes
SHA-256: 29c20dfdfe6bc1cf08c765ab33820024f05a8e4379a27a90ef9abc7624a27db5

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