Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dca84445f1edb6a…

MALICIOUS

PDF

72.1 KB Created: 2021-02-03 08:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: aae1780eff6530917b0bdb3b83af3e8f SHA-1: c4f8636d24b64faba65c88a096e0d0b54c78a2ea SHA-256: 3dca84445f1edb6a17b2cf6e286247ddff2fd343b916ba816e7a430c93f07254
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wb?keyword=falmouth%20primary%20school%20ofsted%20report PDF link annotation
    • https://cdn.sqhk.co/rujamuzizogo/haSiibC/word_search_world_traveler_cheats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481055/normal_5fff1c3c5568d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_600cec0f5666f.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/TVaVNgj/royal_caribbean_cruises_sailing_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447914/normal_5fcb5e97b3fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489429/normal_6012cbe64fc7a.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/semuxemakaw/66233758250.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/38883587870.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/historia_de_la_tabla_periodica_moderna.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/xujomufafod.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/android_phone_version_5._1.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/40799978948.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/black_panther_full_hd_wallpaper_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/9788242830.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/hierarchicaldatatemplate_datatype_wpf.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_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 5452 bytes
SHA-256: 6617476c185be59161f879b89b5e63fb90cac468fecd09451e71c4e828bc51df
font_01_sfnt_off0000efb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 10396 bytes
SHA-256: 061b329014c6bdecee88b13d1747b8ddcda2e338280adc5a7450202e806afa93