Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8a1f0103dff109…

MALICIOUS

PDF

536.3 KB Created: 2022-03-06 03:25:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: d03571e6781416e3f7b39602b5877bad SHA-1: 7681afb19d8964930e128d6a1fb1ecb9eebe837f SHA-256: cb8a1f0103dff10969bd1251eb4b860a07b5471bc2b5d254bd4defd660523b02
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5728

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://pinpointfeedtech.com/ckfinder/userfiles/files/76436441169.pdf In PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/vukepijazodapirub.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/kosowowogugadovera.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/pukadomala.pdfIn PDF document text
    • http://integrotech.pl/zdjecia/file/rezinisamajagusamemek.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/65844907391.pdfIn PDF document text
    • http://andreevka.topmebli.com/content/xuploadimages/file/gedilaranokoxel.pdfIn PDF document text
    • https://www.iccct21.scrs.in/kcfinder/upload/files/63236296682.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/38938313668.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/1521022106.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2022021412475876.pdfIn PDF document text
    • http://www.bioengenharia.com.br/public/libs/kcfinder/upload/files/rifim.pdfIn PDF document text
    • https://pecas.friparque.pt/userfiles/file/11177605005.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620f6e62d2437---dolozapufo.pdfIn PDF document text
    • https://norin.co.za/XSRYdR1H?utm_term=paint+party+flyer+psd+templatePDF link annotation
    • http://niezapominajkowo.eu/userfiles/file/sisoki.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_off0007f14c.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0007f14c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0007f14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F14C 10656 bytes
SHA-256: 95428fd3c50240ad4b9b157979704f5edb7a83bccb3169fb0f3e867df6a8d09d
font_01_sfnt_off000809b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x809B3 18668 bytes
SHA-256: 3a7508c9a8101b56beedcbe2d579e5feb2a2e7ea5455b709ba592bb8a7a2f84c
font_02_sfnt_off00083a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4C 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9