Malicious PDF — malware analysis report

Static analysis result for SHA-256 b472bf6ad2fd2982…

MALICIOUS

PDF

72.1 KB Created: 2021-02-15 07:22:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: df2b104b9a6a1ec86f31000d9ccd7b2d SHA-1: 491dcddc60a4346a6fd7fe3e074a281e1f6a7c1a SHA-256: b472bf6ad2fd298214516d1b40417a08d897e883c2f837db6d1ba4418d93e231
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=har+ber+high+school+football In PDF document text
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5ff8c93b51aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_60138a4c95e89.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/dzNggge/walking_dead_cast_season_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470207/normal_6008f604a8b72.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/hEjiufz/mubuzikebokukimot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412408/normal_602808e633d9d.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/eiaghjf/lolovokemitumev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369919/normal_5febb1370d6b9.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/jh6Zt19/frontier_fios_tv_packages_prices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490961/normal_6027e1fa050b5.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/Lhihewf/mental_hospital_pick_up_lines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_600d1305ee8dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_6021f66bcb5e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fd61ee70d6d0.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/VM1dBL2/lexudekozubus.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/xakapudakadu/muxepugigitezejonutuga.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/arbitrage_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/a_thousand_years_piano_sheet_music_advanced.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_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 5244 bytes
SHA-256: da3625b0b3f1ac241a49271bf0873d92e8f2e1c38b1a086a6aa3350ea5582843
font_01_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 10492 bytes
SHA-256: b0e991118270dc3d2e71c08d46632c0908aeb7be35cc0f2f0f2c141ec49b1649