Malicious PDF — malware analysis report

Static analysis result for SHA-256 941e50c34d948003…

MALICIOUS

PDF

281.0 KB Created: 2022-03-01 13:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 48dd454c5a84215eb2609f65451c1e88 SHA-1: 963f0804e7520259706b909f657d3200fe631dd8 SHA-256: 941e50c34d948003b386edea24d2eb3a4b9e6f96a20ac947e31c0959a45a5091
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a high-confidence heuristic indicates it's a phishing lure using an image to redirect to an external URL. The ML classifier and ClamAV detection further support its malicious nature. The primary IOC is the redirector URL, which is likely used to host the next stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://yubit.co.za/XSRYdR1H?utm_term=arnold+chiari+malformation+genetic PDF link annotation
    • https://sandipkumardutta.com/ckfinder/userfiles/files/patek.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/44900527715.pdfIn PDF document text
    • http://jovanrajsic.net/storage/files/74573718752.pdfIn PDF document text
    • http://www.extoskoko.co.jp/js/kcfinder/upload/files/31583575956.pdfIn PDF document text
    • http://zmksk.ru/userfiles/file/69899259082.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/wazuxuwigekajonafebi.pdfIn PDF document text
    • https://martonelektro.hu/files/file/nidujetebifuviragu.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/828916094.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/27631215112.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/riwaruginawufu.pdfIn PDF document text
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/89334887227.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/pemozesiwixij.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/54310469426.pdfIn PDF document text
    • https://placute-frana-dispaco.dispaco.ro/userfiles/file/pilapavetatajol.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/forasagudutoj.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/46538201680.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620c3e514769b---20027801252.pdfIn PDF document text
    • http://polethique.ch/uploads/files/vexinanifix.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/8084082902.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/32342255049.pdfIn PDF document text
    • http://xaydungtruongsinh.com/public/assets/ckeditor/kcfinder/upload/files/68224181085.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/17039261243.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621000166bdda---dugeturilirowozi.pdfIn PDF document text
    • http://energy-partner.pl/kcfinder/upload/files/768857545.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/duvef.pdfIn PDF document text
    • http://asktasi.com/ckeditor/kcfinder/upload/files/75690389995.pdfIn PDF document text
    • https://lepointdebeaute.be/userfiles/file/tuwupinowegupapoduk.pdfIn PDF document text
    • http://kama-msm.ru/storages/file/nodukek.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/junenexaropuvanedemuzud.pdfIn PDF document text
    • http://banderlogclub.ru/kcfinder/upload/files/zepipubelatabub.pdfIn PDF document text
    • http://www.podunajsko.sk/app/webroot/ckeditor/kcfinder/upload/files/ravob.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/lalidosaji.pdfIn PDF document text
    • http://audiohrestomatiya.ru/content/file/32703078991.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_off0003f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F374 18796 bytes
SHA-256: a8e4f8c73a8ece13eb0158e93a805d7d148699893e9e7dd598637c0bfe9bdf38
font_01_sfnt_off00042506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42506 10736 bytes
SHA-256: ee33fb26ab424d4fe1a21a5fa4bd6cbe076afdb0bd61414254f9843f7196ba27
font_02_sfnt_off00043d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43D42 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9

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