Malicious PDF — malware analysis report

Static analysis result for SHA-256 4255fdae833c491b…

MALICIOUS

PDF

248.9 KB Created: 2022-03-26 12:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 34ae4a25edec9b185c4b1c66296cec24 SHA-1: 9403bff98fd87877ffa7ffe4764feb1d7433ff8e SHA-256: 4255fdae833c491b9fadd553d754c9acffa0a1eca4f76e320e6c940faf0498e0
194 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and external URIs that redirect to a known phishing domain. Heuristics indicate a 'free-download phishing' lure and a link farm pointing to compromised WordPress upload storage. The embedded JavaScript likely facilitates the redirection or further exploitation, contributing to the overall phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6803

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://tevav.co.za/XSRYdR1H?utm_term=farberware+pressure+cooker+owner%27s+manual PDF link annotation
    • http://luyenthidhcanhsat.com/Images_upload/files/vuferepumaruwukoreb.pdfIn PDF document text
    • http://test.currentaffairsfunda.com/assets/kcfinder/upload/files/xuremoxuzixerezedofegevel.pdfIn PDF document text
    • http://mlight.cz/archiv/file/51079772998.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/vmfkba7ck6gg36vmvlhmcmjm02/vikopiwajajijomojax.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/16499588554.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/magadakiz.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/7698415559.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/99444609008.pdfIn PDF document text
    • https://interservicioscr.containter.com/img/imagenes_editor/file/89870677224.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/73064725515.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/93050360965.pdfIn PDF document text
    • http://znsedu.net/admin/ckeditor/kcfinder/upload/files/30637945240.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/162111f5541644---65881382301.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/89352594031.pdfIn PDF document text
    • http://private-dev.cliczone.fr/upload/userfiles/files/zukiwijis.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1623a0e303b2e4---ginujozometu.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/43171592162.pdfIn PDF document text
    • https://divinehm.com/ckeditor/kcfinder/upload/files/95651085786.pdfIn PDF document text
    • http://syscall.com.tr/panel/kcfinder/upload/files/48849912866.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1622e4f3888363---gesaxedaxinut.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0d8de6ecd159cb11b987d8e33d3ffbd9/77675042995.pdfIn PDF document text
    • http://kaica.org.sa/ckeditor/kcfinder/upload/files/50885900246.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/buvevejejasowupotasaduj.pdfIn PDF document text
    • http://www.littlebookofjohn.com/kcfinder/upload/files/91253991296.pdfIn PDF document text
    • http://xn--b1adrijbbb.xn--p1ai/upload_picture/60233153847.pdfIn PDF document text
    • https://xn--q3cceuw0c6ab0d2ii.com/upload_file/files/mafepujakega.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/mesigogojuwuwanibifegi.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/81323126431.pdfIn PDF document text
    • http://servetgumrukleme.com/kcfinder/upload/files/27045976555.pdfIn PDF document text
    • https://www.worldpco.org/includes/js/ckeditor/kcfinder/upload/files/25088341171.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20220305164729.pdfIn PDF document text
    • https://rozetki.su/kcfinder/upload/files/vojugerefobamokoz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16215b41a9c678---wapupedidoropodifu.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_off000370ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x370EE 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0003880e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3880E 10776 bytes
SHA-256: 00b87b0b85d8dc7a45fe8bf7b7b95fbcb56d4e8ae9f0366933fb7f43efffeb57
font_02_sfnt_off0003a0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A0BB 19388 bytes
SHA-256: a27660a67209c62639b1e1fde2a5def67cf49b1bf6fa49de50f76307aaa87522