Malicious PDF — malware analysis report

Static analysis result for SHA-256 4458d28b3af75d04…

MALICIOUS

PDF

92.2 KB Created: 2021-08-29 15:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: c1e67c9e1245987ffb717c5bf8730639 SHA-1: 4b96d87b6d1320decc99ab6edb1f899576eeaf07 SHA-256: 4458d28b3af75d04a949b3e6c3dc5bd58b06bda9cc2a00c8bffd2b265d2ebab8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically highlights the nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://pixomot.ru/uplcv?utm_term=queen+mother+of+wealth+and+riches PDF link annotation
    • http://andlupa.com/userfiles/file/78090058078.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609028e34f776---20975909713.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/11911080812.pdfIn PDF document text
    • http://leguido.net/files/wezemigaxemidorusakogaxog.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210602141633.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/19867153112.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/3aksm6fbko43v5cr1oglsa96r4/tonovowizugowal.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610c89c574894---74700287728.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/b8586271e1d88c306b27f75756adffdc/zegefubefezaza.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c88165ce3c4---42866179504.pdfIn PDF document text
    • http://klientskazona.radeton.sk/ckfinder/userfiles/files/melumonugimirobaba.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/7604cdee1a5de14ed309d5445f4c3588/lepododilu.pdfIn PDF document text
    • http://potya.com/vupegolopavawoki.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/33987976090.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fbae84c64---45636160052.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da6338ee962---34697808759.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/e8lgcc5c5kd9l8urtbugth7mht/4300680711.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/muvewedab.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/97358869580.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/31035075691.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/virawofiro.pdfIn PDF document text
    • http://katachizu.com/img/news/files/71225195187.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/33541007588.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/59669bc584ff7b946cea8268ff5b2822/4939037088.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_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11533 10984 bytes
SHA-256: a6c6c456a2778087202f7d8f293b68dc9bc4e39deab379f9260fe9fb76035bbd
font_02_sfnt_off00012e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9B 19484 bytes
SHA-256: 62477644d1e35800bd81e713b6eb10030a804790596c307372cce06d596df903

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