Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ad3889ca238426…

MALICIOUS

PDF

70.5 KB Created: 2021-01-12 11:28:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f8d5d11700a4ea6ae5462ce1e53d881c SHA-1: d4bcf20c795ed5f52c0dd1e9c82ccfd278d7f0dd SHA-256: a8ad3889ca23842600b128e10d366d72457bfaff97fa0f273587f91102213587
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/aws?utm_term=asa+firepower+2100+datasheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5fdc1af725059.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478664/normal_5fee61938b67d.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/8019710740.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/43669157957.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/36656924580.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/cisco_nexus_9500_data_sheet.pdfIn PDF document text
    • https://site-1167954.mozfiles.com/files/1167954/bujodolusozabu.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/action_games_now.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489993/normal_5fe86203f1660.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/36737204994.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/plastic_dust_sheets_uk.pdfIn PDF document text
    • https://site-1168332.mozfiles.com/files/1168332/clouds_zach_sobiech_karaoke.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/92207077801.pdfIn PDF document text
    • https://site-1168050.mozfiles.com/files/1168050/jofexe.pdfIn PDF document text
    • https://site-1233605.mozfiles.com/files/1233605/san_jose_urban_adventures_day_tours.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40D 5504 bytes
SHA-256: de8c55dd70b3959c79bfd6cb326525d128a6fdf82c593f9e9d497c0f5b0f3125
font_01_sfnt_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 11316 bytes
SHA-256: 1738c5de9550cbfac2162f459ba34a0ea0cbe892c5d536fdca3eaad0c4651a52