Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64c0e13ea025f49…

MALICIOUS

PDF

71.1 KB Created: 2021-01-25 21:03:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6af9d6ee3b0c79795bbc6d909aa7db7e SHA-1: ca2823822eff680e8c121ec397d8451bc2420cfe SHA-256: b64c0e13ea025f498100fc19deb52fd039cad05334cf284f5b8d8cc9ef545e57
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/wb?keyword=download%20dunk%20line%20mod%20apk PDF link annotation
    • http://flowerport.market/walkthrough_for_smasher_io_gameswqf4y.pdfIn PDF document text
    • https://cdn.sqhk.co/nunologen/cNhajjM/free_online_3d_carrom_games.pdfIn PDF document text
    • http://coolvdomaion.online/6265991723xvglj.pdfIn PDF document text
    • http://makamar.tech/cbn_family_channelb7r6j.pdfIn PDF document text
    • https://gimimelaxagoke.weebly.com/uploads/1/3/2/7/132740951/viwowenelefufatuz.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/Mfzgd4w/duvemapom.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/Yzjamid/star_wars_a_new_hope_release_date.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/6f9d61b3756.pdfIn PDF document text
    • https://fiwigerisen.weebly.com/uploads/1/3/1/4/131408459/tolomekazatofi-menele-zufalutefu-buwazagubig.pdfIn PDF document text
    • https://vororesefuvemux.weebly.com/uploads/1/3/0/8/130813496/1602063.pdfIn PDF document text
    • http://aycotoro2.xyz/28298428785jbcyi.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/viromibukoleliw/31440005121.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/worksheets_for_coordinating_conjunctions.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/goblin_ost_beautiful_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/37448357998.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_off0000ca6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6E 4984 bytes
SHA-256: c7a3e2ceb14c4b0244d58094976e09178d3201c80f0244c6a15b78c6644a8838
font_01_sfnt_off0000db6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6C 16376 bytes
SHA-256: 5f317d4f8b59229b5eccb169a651c9f01e98597ff6e5c58ba63294a47cdceded