Malicious PDF — malware analysis report

Static analysis result for SHA-256 72639c0855b2c535…

MALICIOUS

PDF

329.5 KB Created: 2022-02-25 01:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-12
MD5: 507b9fb68efb4a5bacb53476ef4d1214 SHA-1: 59e48d803179efb5c49c313c35d1570abbfffe75 SHA-256: 72639c0855b2c5352a251920ec08e9d82c0e05979b457cf482c47c75a4ee59e4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7397

Heuristics 7

  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://learningkey.org/userfiles/74789145782.pdf In PDF document text
    • http://mientaytourist.com/uploads/files/93525955489.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/55283734611.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/gokakojerolarugof.pdfIn PDF document text
    • http://www.mofald-clpiu.gov.np/public/kcfinder/upload/files/82897768329.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/sobigabev.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/kotovojije.pdfIn PDF document text
    • http://newo.ru/files/files/97683138904.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/81499269730.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/14735647555.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/10/28/file/20211028_085538_101.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/nadagabitugodolugulo.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/51298517961.pdfIn PDF document text
    • http://adice-area.com/pictures/files/megag.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/25493953915.pdfIn PDF document text
    • http://baozhaopharma.com/upload/files/99746895952.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/wetemitem.pdfIn PDF document text
    • https://planbmedia.hu/files/90019312186.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/bopadidoximu.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/kevinuruv.pdfPDF link annotation
    • https://arnetbilgisayar.com/upload/ckfinder/files/78542296019.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/ribojanud.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16171332524fc1---4571647096.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/84667721729.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16190d327208cb---29827403906.pdfIn PDF document text
    • https://netlandschool.cl/files/4972714840.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/32198807857.pdfIn PDF document text
    • http://sgiworld.com/cache/fck_files/file/63620705274.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/xiwodetaviwilusapapomazom.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/tilipalobewana.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/33612440407.pdfIn PDF document text
    • https://mifuj.co.za/XSRYdR1H?utm_term=chisel+honing+guide+bunningsPDF link annotation
    • 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_off0004b4e7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004b4e7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004b4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4E7 19056 bytes
SHA-256: a15128b61b457d23e7267015968da2e91f3230f687ba2a12c5d67c72ea6fd776
font_01_sfnt_off0004e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E748 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0004fe68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE68 10440 bytes
SHA-256: dee7e89db58ee19aa685a31ef22b993fb87cf8bccb8b7f0295bfdc316a97ca7a