Malicious PDF — malware analysis report

Static analysis result for SHA-256 4237cff29a7a2177…

MALICIOUS

PDF

63.6 KB Created: 2021-01-02 10:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4faeeb29648b5fcffbc911ac461f53aa SHA-1: 7a3968703f66ca61327bf192f9507d2ee9553653 SHA-256: 4237cff29a7a2177b74fffce0d20e9c586e633d3324ba1b84f9ab6304d2af43f
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://traffset.ru/wb?keyword=idle%20three%20kingdoms-%20rpg%20hero%20legend%20online%20game PDF link annotation
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/2536452.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/nifovvh/mogusutogepekunux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_5fa7f512afeef.pdfIn PDF document text
    • https://barijimuje.weebly.com/uploads/1/3/1/4/131406344/183b1abd2bc12cc.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/fhi8hgp/fudoxikomum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_5fa46717a5f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f9325a82760b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_5f9fdabeeac41.pdfIn PDF document text
    • https://fojaloda.weebly.com/uploads/1/3/0/7/130776233/331f24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469378/normal_5fba40facf45b.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/jixeremipet/baixar_facebook_lite_gratis_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/club_penguin_mission_11.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/51272424037.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/dark_angel_freak_nation_full_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/wetivazewa.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_off0000bc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1B 5404 bytes
SHA-256: cb0051122d45ee0cebec67caf9da60880e0ab72eb52ef8d3b336c404be014ba5
font_01_sfnt_off0000ce55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE55 10248 bytes
SHA-256: 64cb57dc47e4b4d6fceeddabc2fdf3594049dac673de10ab151b4ca7889e36dc