Malicious PDF — malware analysis report

Static analysis result for SHA-256 524c9a59baba5dbe…

MALICIOUS

PDF

72.0 KB Created: 2021-02-12 15:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 975b2ceb92f10e93ff2835e2a5f04f31 SHA-1: 675ea8395cba0595f6e2195bb7384ddcfe7f0837 SHA-256: 524c9a59baba5dbe315caa7e2bb6f56ae5f7c71302dfb1a82845945371e6f066
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://baarspo.ru/wix?keyword=power+rangers+dino+charge+toy+guide PDF link annotation
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/5882296.pdfIn PDF document text
    • https://cdn.sqhk.co/pijuvedozuw/jjFiOjd/dream_piano_music_game_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/Tichjai/kalesatatod.pdfIn PDF document text
    • https://goxanakevixi.weebly.com/uploads/1/3/4/8/134857001/8717147.pdfIn PDF document text
    • https://cdn.sqhk.co/gozigawefo/bwDhfja/52043137224.pdfIn PDF document text
    • https://cdn.sqhk.co/develezuwa/icCggvP/zefudufovixosibiful.pdfIn PDF document text
    • https://sikefenuvip.weebly.com/uploads/1/3/4/0/134012601/kaferifuvoxave.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/befafuni/dcfs_illinois_mandated_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/self_introduction_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/albertus_extra_bold_fonts_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/famatipenexulopupuwal.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/74777237521.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/radimadigasixoneg.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/89157813253.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/jonisijigogumu.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/70449273923.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/20276249754.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_off0000dbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEE 5364 bytes
SHA-256: beb4b826cc185320892a82590ddab9e55d778859b561b7a94a1cf366a721b31b
font_01_sfnt_off0000ee3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3B 11188 bytes
SHA-256: 6829578ac6ec8ce135b11194db78cd4e0c0052535f4b76e2163475340b063b51

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