Malicious PDF — malware analysis report

Static analysis result for SHA-256 92767bc9598a8631…

MALICIOUS

PDF

68.2 KB Created: 2021-01-31 10:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e7a617423cd337f4eedc6c7e9e3bbaab SHA-1: b512e61c029a3223da7913e7c1c0318cbd5e636e SHA-256: 92767bc9598a863113c41a92e0ab4914a47011c32811dab45b503372483c1384
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://yafferge.ru/wb?keyword=drag%20racing%20classes%20nz In PDF document text
    • http://edarudost.online/465566653493v9gn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_5fcd98c3ddd2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_5ffa16f5de00e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527902/normal_5ff57f533cfef.pdfIn PDF document text
    • http://mazers.fun/narogajalezerukewuviwaku6ze32.pdfIn PDF document text
    • http://rankingcoach-seo.com/568653387rzvhs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459464/normal_6003a0de721ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501989/normal_600634a854ba4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420905/normal_5ff6769d3da7c.pdfIn PDF document text
    • http://lestyprin.online/mirufekov5blu.pdfIn PDF document text
    • http://xtrading.buzz/95299326275s3a6l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450728/normal_5ff5720826db3.pdfIn PDF document text
    • http://gravkamen.ru/helicopter_crash_nyc_midtown_manhattanodnis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384310/normal_5ff1d82f2e7d6.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/legenapi/32858106600.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_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 5016 bytes
SHA-256: ce4a3d8f1de6aad3a5fe5e4ef18e8dbab3f62f1d04bf014aa0b6526f82f15dcc
font_01_sfnt_off0000e0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B8 10364 bytes
SHA-256: a555756898daf941689f7486ee50a2f4529b5556c0d85d830610fdc3dcec6f56