Malicious PDF — malware analysis report

Static analysis result for SHA-256 747080a95d81f9f3…

MALICIOUS

PDF

72.8 KB Created: 2021-02-28 01:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 05ba1d0f25fa8c1a76e86631748fe0f2 SHA-1: feaaed9e2949694a95d9ff2c824830a2be07e4fc SHA-256: 747080a95d81f9f308cf2bb6fcfb9a90f3bb6ed8cfdbe3d1f0bae8634f3c0c91
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/award?keyword=easy+piano+sheet+music+for+beginners+christmas PDF link annotation
    • https://libuxematofep.weebly.com/uploads/1/3/1/0/131070581/fedago.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/jihagfq/garden_wars_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_5fd2ec4fde45d.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/where_is_the_audio_out_on_epson_projector.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459483/normal_5fec594b1e9a6.pdfIn PDF document text
    • https://cdn.sqhk.co/xataruzepape/pwhdgMj/85126901246.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/nuvodeguwawetudazajakono.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/JhbijuL/2414966948.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/jfDggjj/85813599854.pdfIn PDF document text
    • https://cdn.sqhk.co/jabezoxujo/ifgjjjC/9783661845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 5596 bytes
SHA-256: 2f4b653c106a8fb183d053d7cb6419c697d91b8e1d2a120cb5ceec935c60ba73
font_01_sfnt_off0000f3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 10120 bytes
SHA-256: 21542811e5902c87336cc26162c7706c308f66e4ff5daaf917599377c3bf88dc