Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f38369de656ab64…

MALICIOUS

PDF

465.9 KB Created: 2022-03-16 15:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-03
MD5: 981e88bc738856a7799181b7d03ee1f6 SHA-1: c3d63e55b0e6acbef53fa13efed1a43c083fae58 SHA-256: 5f38369de656ab64940e8fec71a43857c47f627cce2b638f231801b2ecf5ac03
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6436

Heuristics 6

  • 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.
  • 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=tent+groundsheet+go+outdoors PDF link annotation
    • http://narcisse.sk/editor_uploads/files/juguvanodubemimerokanofu.pdfIn PDF document text
    • https://officialbacknumber.com/editor_up/sumuwiboragirozakipafa.pdfIn PDF document text
    • http://biopole-clermont.com/uploads/gestion_contenu/files/tixukiruguroxefatig.pdfIn PDF document text
    • https://www.takaotakano.com/kcfinder/upload/files/bofesapufoluvidoremog.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/50721175671.pdfIn PDF document text
    • http://bbckorea.org/user_data/kcfinder/files/39617549549.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/5349544351.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/xofepuputub.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16222a5b509651---56023698544.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/40605964643.pdfIn PDF document text
    • https://generace89.cz/kcfinder/upload/files/rawerobeziner.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/162297633e8d2c---99502594848.pdfIn PDF document text
    • http://snbedu.com/uploadfile/file///2022031107260242.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1620a88079d850---88049617571.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/97409291449.pdfIn PDF document text
    • http://zxsolar.com/d/files/jelolusofoju.pdfIn PDF document text
    • https://musicalfamilytree.com/files/luzunitiwezimetefevusuvom.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/63952070100.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f8b121bfc04---nisapinege.pdfIn PDF document text
    • http://blue-balloon.pl/files/files/3126827426.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_off0006ded0.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0006ded0.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006ded0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DED0 16464 bytes
SHA-256: 5000a77157d630a6c1f3218ddb1cebd42b28805726253e2cca0c9c66de49b21a
font_01_sfnt_off00070964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70964 10288 bytes
SHA-256: 60632303e9d1efea889bcb77a03d86320bea55e19ab69c50470955b98f12a696
font_02_sfnt_off00072052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72052 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9