Malicious PDF — malware analysis report

Static analysis result for SHA-256 efad77d1b41931e3…

MALICIOUS

PDF

78.0 KB Created: 2021-02-19 00:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 05b54585fcfbba11123f5f7a664f2e17 SHA-1: 966164648a6f5110a7fcb2dc826395affcba7761 SHA-256: efad77d1b41931e3a49954b15b05e5383452de648c83626403712523d7c2c22b
136 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
  • 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://leonvi.ru/wb?keyword=the%20summer%20i%20turned%20pretty%20summary%20wikipedia PDF link annotation
    • https://cdn.sqhk.co/sotatixorawi/geIhaha/17618875049.pdfIn PDF document text
    • http://vsspb.ru/34109271726vk5qr.pdfIn PDF document text
    • http://robot3.site/revista_muy_interesante_juniorp5xem.pdfIn PDF document text
    • http://usesalle.xyz/black_landscape_wallpaper0cmf4.pdfIn PDF document text
    • http://twitter-center.com/best_android_phone_2019_to_buycq1hu.pdfIn PDF document text
    • http://jusapp.club/81393889264ywaob.pdfIn PDF document text
    • http://gayerkan.com/mens_size_guide_uk_to_us9yhev.pdfIn PDF document text
    • http://opensoda.pro/prevailing_wage_scale_texasqe7xt.pdfIn PDF document text
    • http://alsamcctv.com/mixixeminunaxidaf0cjof.pdfIn PDF document text
    • https://cdn.sqhk.co/wareberefiz/8hgwVic/ninja_pirate_assassin_hero_6_hack_mod_apk.pdfIn PDF document text
    • http://bhd-management.space/palafarovumixopatemiyo5i.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/tozaduliwubega/land_registry_unilateral_notice_form_un1.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/59269398854.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/large_craft_foam_sheets_michaels.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/61575301856.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_off0000f50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 5376 bytes
SHA-256: 4a59d5755fe78cc3d5f54104022458a95feb5d4973eb6afb10cff9f786eeb965
font_01_sfnt_off0001073b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073B 10612 bytes
SHA-256: 73fc9faa3ab96a11aa63f8ceabd97db41f922115478911bff1949162422f7ca0