Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb87c77527d6394e…

MALICIOUS

PDF

375.2 KB Created: 2022-02-13 08:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: 48e0df8fccefe83c7670237153fdb427 SHA-1: ff196e958f401956753023c29d54d68cfc0538e5 SHA-256: cb87c77527d6394e6f62bb2db9e489a2abe291a4cda5d2be3fea49fe85ec1eda
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8248

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://colod.co.za/XSRYdR1H?utm_term=preschool+syllabus+in+sri+lanka+pdf PDF link annotation
    • http://testplanet.nl/uploads/files/52948465576.pdfIn PDF document text
    • http://schubert-hh.de/image/file/beparurawitozuboxogagek.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/80208483720.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/27257180915.pdfIn PDF document text
    • https://arendic.cl/files/fegidilaxurowirevajebe.pdfIn PDF document text
    • https://cmetrix.net/ckfinder/userfiles/files/pikonetisorumilemo.pdfIn PDF document text
    • http://simonide.org/userfiles/file/88644443482.pdfIn PDF document text
    • http://www.lesboutiquesquercitaines.com/kcfinder/upload/files/befam.pdfIn PDF document text
    • https://landroverbh.com/ckfinder/userfiles/files/78783316266.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/80391045163.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/petabuwisatupufipazurudut.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/46741569285.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/delogupusaxibanaji.pdfIn PDF document text
    • http://wellgroup.cz/UserFiles/File/86411633920.pdfIn PDF document text
    • http://letdentalab.com/img/files/mulito.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/nigemurufemamotorop.pdfIn PDF document text
    • https://bilgepen.com/panel/kcfinder/upload/files/75390895054.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/nujetidawukiragopobif.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/12404301600.pdfIn PDF document text
    • http://24x7taazasamachar.com/assets/ckfinder/core/connector/php/uploads/files/77147091069.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/21951414178.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/zunikinupuzojudubakeno.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f0453b49f7a---20488348259.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_off00056d96.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00056d96.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56D96 11068 bytes
SHA-256: 724d7ae866ad027e771a25d326e24027a02997310960df6d3493fb7fd145d777
font_01_sfnt_off00058714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58714 17964 bytes
SHA-256: 441eb2255f7478cc51f5884dd4e6d372be536b1e942af089829af4db61e1b030
font_02_sfnt_off0005b6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6C2 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9