Malicious PDF — malware analysis report

Static analysis result for SHA-256 77efc967c608ee0a…

MALICIOUS

PDF

61.7 KB Created: 2021-02-18 01:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 15a6272dcc52a68ff4ca65813c56885e SHA-1: 503e2a0076f3263dfd068f703589a5ccca09e2ee SHA-256: 77efc967c608ee0a5403ac0c48d51995b9e6a27218dea9f1ff96874974e03331
136 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
  • 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://jacksth.ru/123?utm_term=08+avenger+starter+location PDF link annotation
    • http://1xbets-regs.site/51145107912t7wj6.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/hibe2hh/purodusotosuboxelile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380226/normal_5fe3f7dad8f48.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/hdwmgha/95707450430.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5fcd5317079b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410207/normal_5ff3f4d30f65f.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/gjcjejd/92280919847.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/gfbjbjd/23455025918.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427105/normal_5ffbc6d3ab822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410207/normal_5fd162111b8d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406501/normal_5ffc9e16126e8.pdfIn PDF document text
    • https://cdn.sqhk.co/pekuwalixeso/elPjehj/64856027358.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/gUrhjgX/ants_horror_movie_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_6014a0c4a1cac.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/fenatagazise/21644339795.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_off0000b6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6DC 5268 bytes
SHA-256: 2a8dbccfe21a131385d6a7c8f338c15c6cfd9c29bff08067de6a4299dd121740
font_01_sfnt_off0000c8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E0 9648 bytes
SHA-256: c206a7bcd6c0ac92419ef20d8bb092c08a869941872322d3c716ba6570ed1d43