Malicious PDF — malware analysis report

Static analysis result for SHA-256 4251b40af2f67887…

MALICIOUS

PDF

274.3 KB Created: 2022-02-04 21:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 9d6a9971fb8f0401a803a460ef40da92 SHA-1: 178015e1f80e738608d38b00bccd88967d529ef2 SHA-256: 4251b40af2f678874e278a4af2387f40f178b1fcbec2690a54a953647b60b77e
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8179

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.
  • 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.
  • 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://norin.co.za/XSRYdR1H?utm_term=deadlock+in+operating+system+pdf+tutorialspoint PDF link annotation
    • http://helderlive.nl/ckfinder/userfiles/files/buwebavavokapalotofu.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/jorefafom.pdfIn PDF document text
    • https://www.conepe.org.br/public/ckeditor/kcfinder/upload/files/54129333254.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/1033479009.pdfIn PDF document text
    • http://cwesp.biz/upload/file/2252777169.pdfIn PDF document text
    • https://www.tailormadeholidayspt.com/kcfinder/upload/files/58910912001.pdfIn PDF document text
    • http://vaynhe.com/upload/files/44813175633.pdfIn PDF document text
    • http://yejida.com/userfiles/file/baripukuf.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/mefuzavewefisiwovine.pdfIn PDF document text
    • http://chayka-svg.ru/files/merimamuk.pdfIn PDF document text
    • http://sage-chem.com/image/files/20211126_114723.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/41732059292.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/81973102137.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/wegasulakigimejizapo.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d0695340fd---loxepomasenerujiwijikena.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/49553117202.pdfIn PDF document text
    • http://autovoda.ru/upload/files/zobidopagaj.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/xadeximibel.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/ruxamojakibitoj.pdfIn PDF document text
    • https://ms01bet.com/contents/files/53025664178.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16174cf7847faf---32088906437.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/golavabutimevezamedosekun.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/161642f50c4bca---38900894328.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_off0003de9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DE9C 11268 bytes
SHA-256: 12088e594ed8d87c82d954a3522e8c3899ee0b7962cf55f0f5bd7efe41a704be
font_01_sfnt_off0003f8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F8D6 16524 bytes
SHA-256: d13de22f7044f2ba8aa95d897974f309888941221f94eeccf47df64a3a1cedcf
font_02_sfnt_off00042385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42385 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9