Malicious PDF — malware analysis report

Static analysis result for SHA-256 4458694bc1788c71…

MALICIOUS

PDF

311.2 KB Created: 2022-03-25 19:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 02835036f3fe2bc20da2cbb97a1e496c SHA-1: 8bf9e7b4123b5df6689504dbc39b3b18137edf30 SHA-256: 4458694bc1788c716fd1b7b6c0eb07378642e4824fa73e150a7c8536bbbea002
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, with high-severity heuristics indicating it's a phishing lure. The embedded URL `https://fecuq.co.za/XSRYdR1H?utm_term=craft+trifling+glyph+of+health` is identified as an SEO redirector, commonly used in phishing campaigns to obscure the final destination. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest potential for JavaScript execution or exploitation to redirect the user. The document body was unreadable, but the heuristics strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8383

Heuristics 5

  • 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.
  • 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://fecuq.co.za/XSRYdR1H?utm_term=craft+trifling+glyph+of+health PDF link annotation
    • https://www.ewdel.cz/ckfinder/userfiles/files/wojovor.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/megoj.pdfIn PDF document text
    • http://insei.eu/userfiles/files/45907425373.pdfIn PDF document text
    • https://defi128.com/userfiles/files/76225666182.pdfIn PDF document text
    • https://www.maniocenter.com/imagenes/editor/file/24036505205.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/lugorulizipifurem.pdfIn PDF document text
    • http://archive-2015.humandoc.pl/attachments/file/jonetazikoge.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16203577bde0ae---38192290504.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/kezalifodelijufubakoxanuf.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/vovow.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e48c37bedb867cce35a55b545f4a291/renomoxexukas.pdfIn PDF document text
    • https://residencialconilcosta.es/kcfinder/upload/images/files/mugesof.pdfIn PDF document text
    • http://klimafertotlenites.hu/kcfinder/upload/files/18032530955.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202203091056394495.pdfIn PDF document text
    • https://vrm.vn/kcfinder/upload/files/92004067353.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/11787437708.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/fejifaxuz.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20220204_371AB1B6412A0BC7.pdfIn PDF document text
    • http://itagqatar.com/itag/file/files/50781904636.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/sasunijogibigamevebas.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/ruvitexeputuxefedo.pdfIn PDF document text
    • http://kef.org.pk/kcfinder/upload/files/melak.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_off00046d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46D5C 18480 bytes
SHA-256: 27e43381d0489b49c3246f9e312a46088341a714ca2771a093f0d5c49dae6d03
font_01_sfnt_off00049db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49DB1 10616 bytes
SHA-256: 33161dea81df5d0defc11417c4ef0b177ced32da1abdcad8a7bf2cdfeed3edf1
font_02_sfnt_off0004b5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5E3 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9