Malicious PDF — malware analysis report

Static analysis result for SHA-256 458567a37edf576e…

MALICIOUS

PDF

68.4 KB Created: 2021-02-25 22:08:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9ff568b70adbd6010c3a2a86120340ef SHA-1: 929a2515f90bec9c26bd980d3cb011934fff773d SHA-256: 458567a37edf576e1da4ca48b564d0acc2f466fabe3d0b3fc6ecf02415476b51
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://bologen.ru/wix?keyword=match+each+term+with+its+definition PDF link annotation
    • https://cdn.sqhk.co/ketusugedi/heWgi4K/aesthetic_painting_ideas_acrylic.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/Phh1idr/amazon_smile_registration.pdfIn PDF document text
    • https://cdn.sqhk.co/zotevokep/v7GgiwJ/80481894350.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/63666853589.pdfIn PDF document text
    • http://punejew.mygamesonline.org/fedex_canada_tracking_customer_service.pdfIn PDF document text
    • https://cdn.sqhk.co/wexifidobafo/kEeeBje/67134461420.pdfIn PDF document text
    • https://bilukejax.weebly.com/uploads/1/3/5/3/135392742/ninonupib_dajovilisadame_mamob.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/ajbgdid/toca_nature_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xanapaje/4PryieE/23151683861.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481828/normal_5fcaa7479dfca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/28132141287.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_off0000d117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD117 5324 bytes
SHA-256: 0a1af7b2439594da6d508eee85a1adbe6be588f428db1df814cb35d194073948
font_01_sfnt_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 9928 bytes
SHA-256: 067d6f232fdd99a54a547c7cca63715cc925269a8949acb228cfdf6767817bb3