Malicious PDF — malware analysis report

Static analysis result for SHA-256 24389ce699026e2a…

MALICIOUS

PDF

70.4 KB Created: 2021-03-02 19:29:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 46b3a0bc21b045da08075caa7599f2c2 SHA-1: 6eb330f4f9a93057ac4209cd89b87089dc26b033 SHA-256: 24389ce699026e2a81b1c5c12d85635122654b070828359fecbc43b37ed4ad1d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/award?keyword=what+does+cutting+for+stone+mean+in+the+hippocratic+oath PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417534/normal_603d6e4fec704.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/sDOkhiV/kogamofiliwidim.pdfIn PDF document text
    • https://buxudirikebipur.weebly.com/uploads/1/3/1/1/131164004/memudonukunilazap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_5fe74f113054e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422640/normal_6037f3e3c0e19.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/bhjzEjh/xezaxazewepet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489848/normal_600224202ca9b.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/Qz5geJr/cowboy_bebop_wallpaper_1920x1080.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489411/normal_5fe4f2d562d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481402/normal_601b64ffeb57a.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/wopari/manistee_river_trout_fishing_report.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_off0000d764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD764 5552 bytes
SHA-256: ffde21220d2b38f79a222bb25544e44beced2d25086afe5ca090f7d179388d6e
font_01_sfnt_off0000ea2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 10060 bytes
SHA-256: 3b57216b4d54ed66a269ffde373ce56dfb757846acdf646c62c31a2dfce85e1e