Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4cd146f26e0c5a…

MALICIOUS

PDF

73.3 KB Created: 2021-06-27 21:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c70587f6d95a0ab3402e0dd96be2d85a SHA-1: c256e31e2e34f9fea6ce784c4fa57d5ec8405217 SHA-256: 2a4cd146f26e0c5afa00ee3ed5853a1c353cd7ff5252f192f7c71993c10a6df5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be social engineering via the linked websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ee218b326---20859903364.pdf In PDF document text
    • http://cy2hand.com/userfiles/teluxukofiwuwukoriwineja.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/eb5ad69d398efc140734caa142f339c7/49300934651.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/f3462db76e08fc3ff9781a10de94c618/sifolofomoniri.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/13c3c5fdb7b198cabbfa5d9357d67a34/86400036570.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5c7d6130d---29285871377.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/45116513746.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e305b762d9e8d8db2d4a3765724be4d3/59911668745.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffe6a0c16c---rufusevifadovegejobuvo.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5ab44148fce89861a0ac92507460c9b6/66854222495.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c446b51f0---bevene.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160803d87a5625---xitobegapesigi.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/78462228632.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/rphsm20evi4rr8ocvv9hct3c75/memiximelubotejirojarajo.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28246e173---lokibozudowojononatewu.pdfIn PDF document text
    • https://lecapsuledigian.it/file/95811090950.pdfIn PDF document text
    • http://prosquash.by/data/leforogeruvitosuk.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/makivazoxulovimabutu.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/26069704067.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/tanezisunow.pdfIn PDF document text
    • http://chinazzjx.com/d/files/59478497629.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/wabamofamuxufirosoxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+do+you+unblock+a+phone+number+on+your+phonePDF link annotation
    • 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_off0000be64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE64 10944 bytes
SHA-256: dd29b375f915070095ec940d4ab82c8aba645e154e8b3bf3a2dfc91a8f9b937f
font_01_sfnt_off0000d753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD753 15656 bytes
SHA-256: e6fb830f1ac364258a99ddcff6d5e3baf965267db6d3e329c95c9922ca67e861
font_02_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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