Malicious PDF — malware analysis report

Static analysis result for SHA-256 465c62dc226fb97a…

MALICIOUS

PDF

63.4 KB Created: 2021-02-24 00:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3ec74bb503a5248c1d6e0f91bbfe8025 SHA-1: f47b600bd5b3a8a7411773822c56d895d24f83b6 SHA-256: 465c62dc226fb97a67aed2eb0f1118e24599a7e10c9809134f147ebe87be9751
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=national+treasure+math+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445125/normal_5fd6e8d84f992.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/Gchhuge/weather_in_boston_today_pictures.pdfIn PDF document text
    • http://salonapp.xyz/18604845572u0yc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_602a183395873.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384152/normal_6001a9a84d14c.pdfIn PDF document text
    • http://prosale.company/gojorijepinutomimibegutavml6mm.pdfIn PDF document text
    • http://probmake12.xyz/24442327973lglz7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387932/normal_5ffb10c17da85.pdfIn PDF document text
    • https://xuvaguwofivopi.weebly.com/uploads/1/3/4/4/134463587/2cb4252a.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/sugosubexez/lifokijulewuwatawasositu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/53635056106.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/botw_elixir_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/kobajil.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_off0000bd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD22 5052 bytes
SHA-256: 0e1d93ae89d54667bb5f861b2644078e3adfcfdcfc94bc39f72c5f7ec35b7af8
font_01_sfnt_off0000ce38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE38 10068 bytes
SHA-256: 47263234f3124148ed1c42465e2961daae6f039635b6034d62ec92095afa9436