Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea244c94851014f3…

MALICIOUS

PDF

62.1 KB Created: 2021-02-19 16:15:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bb616b7052e40d6aa2c40247c283d63f SHA-1: a5b55c105523c3d61f49d306f7b112f21dfd2035 SHA-256: ea244c94851014f334b5baa433858015221b26a8128aa4be0b53fcccc89dffb6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=avancemos+1+textbook PDF link annotation
    • http://zuluwana.iblogger.org/chinese_movie_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/peposusuwi/gi4N7HK/rolling_stones_albums_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460473/normal_5fdd2fce01999.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402478/normal_60063850757f0.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/iVgjqhU/color_by_number_happy_paint_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/jcqjehf/video_lyrics_maker_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452850/normal_5fee3bddb2406.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/ajgibha/halloween_makeup_mermaid_tutorial.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/ratixifo/after_effects_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/view_hidden_spreadsheets_excel_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/risk_assessed_management_plan_template_qld.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/neumonia_en_pediatria_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/integral_calculus_for_beginners_joseph_edwards.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_off0000b4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FF 5188 bytes
SHA-256: 985d6d9baf64dd19d3211028cc8af6ac15594b27593422646e21b55877499059
font_01_sfnt_off0000c6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AD 10644 bytes
SHA-256: 1db63eb0f77f4cd2db276159bebd6c0fd9541d55eceb5f492cb4be821b48a8af