Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9a47f6523b04df…

MALICIOUS

PDF

74.0 KB Created: 2021-01-27 16:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 930fb135b986b861bb4f619ec49a4ce6 SHA-1: b8b1af0388686078ab7dc1f761f910d1bccf27cf SHA-256: da9a47f6523b04dfd465eb1b90469b2571955a0a21fb6ef59bc724c7843af44d
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://jottigo.ru/aws?utm_term=dallas+mavericks+dancers+new+uniforms PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383806/normal_5fdcc4c183af2.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/guwimanoxafezala.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/hUghFjj/the_art_of_war_audiobook_free_download_mp3.pdfIn PDF document text
    • https://veretiwuwe.weebly.com/uploads/1/3/1/4/131406621/tomavulipidetunakev.pdfIn PDF document text
    • https://cdn.sqhk.co/talurelope/aiihfhd/zefujebokekatav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_6010324b11a20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5fd8b1d274eef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371553/normal_5ff683645fe9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380384/normal_5fe3e638a86ac.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/jjiaif8/download_wallpaper_anime_sad_boy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_600f6fabe41a3.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/6924472.pdfIn PDF document text
    • https://cdn.sqhk.co/merivexasug/j7Yghr8/swepco_electric_company_longview_texas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417999/normal_60011e741a8a5.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/lemefofutomapox/32088955874.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_off0000e383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 5380 bytes
SHA-256: 71e1ef4ad7f13e0870b737783f4bbaf29f5685eec7148b7ce3e0b4d0c2898613
font_01_sfnt_off0000f5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D5 11180 bytes
SHA-256: 7197f3f00cc406ef43b99ea4a1ae2440da864365071b6e491fd14a93b704598d

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