Malicious PDF — malware analysis report

Static analysis result for SHA-256 4326f080cc7e2f08…

MALICIOUS

PDF

74.9 KB Created: 2021-07-31 19:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 97faef90fcaa54c29aa1b7ded4373284 SHA-1: 45c83cd176dfe41a546c2a44296f170eacf385f4 SHA-256: 4326f080cc7e2f08f15d2c9d905a0b61c026d98879bde31851b3627761f6d38a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous embedded URLs that form a link farm, many pointing to compromised WordPress sites or disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the presence of numerous external links suggests an attempt to lure users away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://cructi.ru/uplcv?utm_term=sopas+de+letras+para+imprimir+para+adultos+mayores+pdf+gratis PDF link annotation
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd3b785f0d---17682850242.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/bejozoniwipumisebu.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/95528995552.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/99801457201.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/o7kukh9p6s40l1emgipv19k02m/gegilonewitumobukomixuv.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/zuxilu.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/63315600830.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/tewalurumebadafeluved.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b80eb1714---waziraxu.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/ce0753c2cbc7bad16659e9c433856466/wubofona.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c3409dc44---vekonudale.pdfIn PDF document text
    • http://apcmagon.com/userfiles/banedepowezegujerinitum.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/91667354be94de00b91fc1aff1328a34/tebefokojuluwagu.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/buratenaku.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16102fc9fe72dd---kurewometaleror.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d46a7ed70c63bff197d08c087a4bfc53/fikinibevoxida.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/def2815b9d8775d46aabe62d658df960/5597891116.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/95144613038.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5cf040cb0---xegot.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/a626b18cc5ef1123f7fdf859e425e39d/dixaputiga.pdfIn PDF document text
    • https://yellowstonewildlife.com/5329536571.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/lqhnc81hp2ktmm847bf1ouejtm/rizimitadowufasumerix.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_off0000bdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EC 11028 bytes
SHA-256: b1cc0f488259001c86f5b6b993a00706513409a5e20247372f2db950961c5a38
font_02_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 17548 bytes
SHA-256: 2773049c99872e88b23043816e4f097dd8b5e7da468acfaeb6610989e70f1cee

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