Malicious PDF — malware analysis report

Static analysis result for SHA-256 25cb54665c783b93…

MALICIOUS

PDF

408.2 KB Created: 2022-02-08 19:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 1f2f28189dea0200b8d22181f391a1f2 SHA-1: dd85d76dc283688d5b75e3d236511723a16b5cc8 SHA-256: 25cb54665c783b9322c5414dba0d1ee566d00ce0b498fbdc9c4198634bd2a1e6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a phishing and potential trojan distribution. The document uses an image lure related to 'Ashitaka and san violin sheet music' to trick users into clicking links that lead to compromised WordPress sites and SEO redirectors, ultimately serving malicious PDF files. The presence of multiple external URIs and the 'free-download phishing' heuristic strongly suggest the intent is to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7309

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lazav.co.za/XSRYdR1H?utm_term=ashitaka+and+san+violin+sheet+music PDF link annotation
    • https://milkywayads.com/webroot/img/files/zezavaleribiroze.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16183f6759090e---56747843245.pdfIn PDF document text
    • https://drterrace.com/london-100.com/userfiles/file/totujipowivabefijal.pdfIn PDF document text
    • https://overnachteninorvelte.nl/bestanden/files/56200320118.pdfIn PDF document text
    • http://potolokomsk.ru/ckeditor/kcfinder/upload/files/wuxebuviwupo.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/wulesafodi.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/20882967798.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/cc93c2ababf92089d0e87fd3b1348094/vubojizatuxusasa.pdfIn PDF document text
    • https://ahha.az/userfiles/file/tibivovetawokitazufiwog.pdfIn PDF document text
    • https://pgprojekt.pl/Upload/file/jepoduk.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/duwameli.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/79341412122.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/fosaku.pdfIn PDF document text
    • http://fairmonteast1975.com/clients/0/01/014dde3c838f86fef2ac1d31a86c415b/File/44708437087.pdfIn PDF document text
    • http://newtrichur.com/userfiles/file/8432098503.pdfIn PDF document text
    • http://travelsolutions.co/ckeditor/kcfinder/upload/files/95171855374.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/robigekugepeboratafexaxib.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/wiveluwuteturodubezili.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/jarareroguvepizujobove.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/piradozejemolevila.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/xaraf.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/bf70ff5532061babb6dc5792ae503258/mikomobarulusiwaka.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/tavixisomomudoviwu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161f883bb64487---jalivurojowataratew.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0005eceb.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0005eceb.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECEB 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0006040b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6040B 10776 bytes
SHA-256: 0a89f54422812b94964824511e2e31929374d9078169547c8d09433c115eeb7e
font_02_sfnt_off00061cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CBC 20052 bytes
SHA-256: 6c11a8626511e752596866b1d80826dd17d30da8da7ab700c387a7ebd11e0e9f