Malicious PDF — malware analysis report

Static analysis result for SHA-256 941b2d2591d0103e…

MALICIOUS

PDF

360.8 KB Created: 2022-02-08 23:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: f6f10f74fccfd71424374657a78655ec SHA-1: 6e8498d9b97b61d75555908c0f581a7338c6412f SHA-256: 941b2d2591d0103e81fdee47f838b54102f5236067ef9154732bff07ec42fba6
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a high-confidence ML classifier flagged it as malicious. It also features a heuristic indicating an image lure linking to an SEO redirector, suggesting a phishing attempt to trick users into downloading a payload. The ClamAV detection further confirms its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8457

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://colod.co.za/XSRYdR1H?utm_term=inventory+report+format PDF link annotation
    • https://cosplay-expo.it/ckfinder/userfiles/files/15488891869.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/waletoge.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160ff9f86e535a---97076914344.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1618eedc9cd17f---46094069804.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20211009232259.pdfIn PDF document text
    • https://companydemo.opusviewdev.com/app/webroot/js/image/files/penaxirigixusijekomi.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/47704241297.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/vamusipikulumav.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20220201132832.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/kowuzedejufaxomunemi.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/pedufejimupi.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/18152466380.pdfIn PDF document text
    • http://ruishikaishi.com/upload/content/files/2021/08/20210819084529.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/13562545223.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/11324063730.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/juzeraw.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/44373561701.pdfIn PDF document text
    • https://riausky.com/editor/kcfinder/upload/files/zidaresuzumatuvore.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/pavijogowiliniliju.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/2950637386.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005352b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5352B 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00054c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54C46 18796 bytes
SHA-256: d93990007debe76bea1ec3182502b89540d036cadc6777d3e6d1fabdf3b785da
font_02_sfnt_off00057d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D53 10344 bytes
SHA-256: b08fef7266197eba99f6b8a7a39a2b23ea9bdca4842b01e603eac883bcb5ad4a

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