Malicious PDF — malware analysis report

Static analysis result for SHA-256 8478b15409d8fabf…

MALICIOUS

PDF

497.9 KB Created: 2022-03-10 01:14:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-05
MD5: 0991041d76ccaa2a579a88a17bd029f1 SHA-1: 4f5f9dcc41dda5b6b73fe06df810e784eac61f21 SHA-256: 8478b15409d8fabf9c40917598d13863eafea1c3056ac61994c1dd4d0db8e61c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4545

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://cafij.co.za/XSRYdR1H?utm_term=aadhaar+card+new+apply+form PDF link annotation
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16212d3162a281---76004546156.pdfIn PDF document text
    • http://koronavirus.lenti.hu/feltoltes/files/bigomubaperolewuwilu.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/jiredobi.pdfIn PDF document text
    • https://primer-spb.ru/files/files/3525972952.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/65220114485.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/44603942393.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/zolikanifiwonowimebe.pdfIn PDF document text
    • http://vroa.pl/chplusfiles/file/lenerebe.pdfIn PDF document text
    • https://www.cltservices.net/backoffice/kcfinder/upload/files/10290932605.pdfIn PDF document text
    • http://cbconsulting112.ca/userfiles/files/536006076.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/63980137001.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/xezosisadodoj.pdfIn PDF document text
    • http://netpart.hu/kcfinder/upload/files/dixogemudokotavapizuwi.pdfIn PDF document text
    • http://sv-orhidea.ru/upload/files/napexe.pdfIn PDF document text
    • https://patriciogaete.com/upload/file/gokikopefojumimiwede.pdfIn PDF document text
    • http://www.nstrechy.cz/upload/files/24167479780.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16210fd52041e4---45664806610.pdfIn PDF document text
    • http://www.fairvalesecondary.co.za/kcfinder/upload/files/49370221860.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/xozebuwelezeburej.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/wuxawatixu.pdfIn PDF document text
    • http://sv-orhidea.ru/upload/files/68077721174.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/68197571129.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621f852749caa---48116219271.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/85672753311.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/29443943575.pdfIn PDF document text
    • https://phukientubepxinh.info/gomsu/sanpham/anh/files/nuzonokogepeketaweleruzat.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20220215070648.pdfIn PDF document text
    • http://sjanzee.nl/file/guvebosiboninejiz.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_off00075634.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00075634.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00075634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75634 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00076d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D4F 19092 bytes
SHA-256: 625c581210ba1941879bb58f645d0578cbe41bd09e530a3fe9333cc2806b5814
font_02_sfnt_off00079fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FA4 10708 bytes
SHA-256: d13d5058e134d571977c7482213834dd125e8d8467a37e400eae0cb590722d1a