Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4d6f81052a21ce…

MALICIOUS

PDF

83.2 KB Created: 2021-06-26 00:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 25699d846931c4fa7141bbed1b58fc49 SHA-1: 5a1f5b40eabd3ad0453bcd05bd627e41ea7dfa9c SHA-256: 1e4d6f81052a21cea7e5a9d81264d70cf9f611846853d555c9be59e555e0f5cf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites. The presence of these links suggests an intent to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=english+written+test+9th+grade+answers PDF link annotation
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/pl63481kiu2apshkif8mgp294s/84849073117.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/pakebugizetaza.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/83ad4cad2340fe66f2754524301022b6/58264473250.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/pamom.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/54469699348.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a962f70e946---31383701716.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f0028f0fd---30260670348.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/9bt5vd6vdspb1msvk9kmour9sg/36683812236.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5991ef857---bumevezezipabuk.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d626916c1---fogetexozulaxadutewib.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/tupafexikupuxi.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098255ad9a12---89020361990.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/rujeteziwofagu.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608510b60da64---zegotizisotok.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/geruwol.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/61811610900.pdfIn PDF document text
    • https://europartner2.pl/uploads/80953085455.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/vibowat.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ee78e0352---94883809239.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/41364283698.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/79085828865.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832cfb8134a---52976379288.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AB 16988 bytes
SHA-256: d162ab8ca7f97f300932415b9d04e90f483c2e5def83abe10c995446fca395fc
font_01_sfnt_off00010dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 10644 bytes
SHA-256: cf2fcbb16e58798a359ba1ccf5c80e5a07618faf77ea7cdd3da9da0eaa7706f1
font_02_sfnt_off000125ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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