Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9bb79fe0d69f20…

MALICIOUS

PDF

67.7 KB Created: 2021-02-11 01:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0cfd5cd7355a54ed6a136b54a49a8438 SHA-1: 7586ec459a8a96240c17c82ca5f0d5301b2609ae SHA-256: 9b9bb79fe0d69f20a50888a83d5e1cf7159aff5a3eaf5f0c902312ca5bee00f4
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://yafferge.ru/wb?keyword=alage%20alage%20audio%20cut%20song In PDF document text
    • http://websecurer.tech/bisilikonunurosurirazogif1trzw.pdfIn PDF document text
    • http://yeswins.space/xapigefoyano.pdfIn PDF document text
    • http://milansit.space/alkalinitas_airzinh3.pdfIn PDF document text
    • http://mif-smeh.space/bethena_a_concert_waltz_piano_sheet_musiccn78e.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/petikamov/adrenalina_efeitos.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/chronic_pain_management_guidelines_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/rediwegixoritowifolo.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/block_strike_for_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/sanop.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/welofitepusabonikulovuk.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/rental_contract_template_month_to_month.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/15236931311.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/lifukovolepoleduvugetag.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/rimworld_ice_sheet_raids.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/altova_xmlspy_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/43343534814.pdfIn PDF document text
    • http://sisuvoxodukon.epizy.com/9512873344.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/joxolisomivavemexosoz.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_off0000cc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC19 5000 bytes
SHA-256: 272b253e919b8abc596110208af6e0e1e3ab0eb65c4332c0849ccc03debe0839
font_01_sfnt_off0000dd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2F 10988 bytes
SHA-256: 21e97fba19333067946a759960057ae9a82f9a7a1e853876bea14e46fe75a61e