Malicious PDF — malware analysis report

Static analysis result for SHA-256 115b381e78c13220…

MALICIOUS

PDF

89.9 KB Created: 2021-06-22 12:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6864f66717862058c81f1d2d6f5058b9 SHA-1: 4cf40e1333f05bfcc9ab3fe180a5f2786c21498e SHA-256: 115b381e78c1322042115e276576768466a40b3777cc71bfc79cfc4d4e33bc7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to an educational test, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://krisoc.ru/uplcv?utm_term=begripstoets+graad+3+pdf PDF link annotation
    • http://samtekelektrik.com/files/rirebis.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/zuvobupumuroji.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0vjl4pba9gd3uq0v7dtucqvks0/xivabitorix.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ial7sa3igip386u2tc0i8e3nd6/5751624738.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608df5c12f4a0---sodumugojutisotalifuvukex.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/91bbicn8flledepd3kjl5734ke/movegovodedoji.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/gabajewamapozav.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/4787ce00b2423c0cc1b85dfacd166286/madoramudaxebofudumoba.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609397c7cd86c---mapatiremap.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/gaxubasavurawolem.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/f47338552c1404340cc3db2e7b1edaad/21635217116.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/2141101256.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160ab88690bec9---wibikuf.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/d9eb190f0b3fc419e0de8b99fa56d2b3/xiviz.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/78000772569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 3920 bytes
SHA-256: 044b70934e9cfa5cd212dbdf0fbc4ab84f702fc757be263256419dff03727c27
font_01_sfnt_off0000f73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73E 5072 bytes
SHA-256: 00d7eae24ad521b81e69bf46e9a370739801597afdeb61884fa5e5da543bc58a
font_02_sfnt_off00010895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10895 14020 bytes
SHA-256: 6bd3323ec203a5216cc92f4c331c617b92c633b37b36c7f7e578a2f084184e74
font_03_sfnt_off000136c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C6 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_04_sfnt_off00014bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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