Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd93d650c1ab6f86…

MALICIOUS

PDF

99.8 KB Created: 2021-06-27 05:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c391e17827c84eeca9bc7b4ba80c1855 SHA-1: da5f281bed6e341e27b9b95da35dd5cc3e353827 SHA-256: cd93d650c1ab6f86d78baacf4022079d4a6dcb1324424035e6e0a625e537342a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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=actions+that+start+with+d PDF link annotation
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/e23770d9cd6007d7408c169bafc60e9c/30820829203.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1609892d0b259f---botizotubilubada.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/55254284277.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/cb00e117c27e522fc5755d87a322dd71/36948926112.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/97525876949.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/c2979ab5e5995c0e7536dc8536584847/guwus.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/5046317562.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/57193109143.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc959e2d18---gigozoj.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/wokopejebozemepazabufuma.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a14ce627888---35307913510.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b6b0329bd---67261651610.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/fofagawesasanupa.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/6186831995.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/b9fb282a1107cf4331962a3ebae80db8/nitodagudagemefazubemax.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/25303826944.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/vunagoferivorenevum.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/kmjgvemt1thsm1dfq7jbs56e7l/kewiseloguvubujedidigafof.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b153941626---8558943309.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/30836f300963aff370146bfd487ba309/dobesag.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/o9fd1mpan952s9odb5fibm0v73/nenot.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/4db27d447fc276b28ef9995438b21d9c/sazusixulutilifojonowigi.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/lemonusijinexaluvaj.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/womofilubudazafi.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160747f8502378---49800432578.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_off00012467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12467 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C79 17548 bytes
SHA-256: d6857012dbad739e6f99596cf6df03df63993ad9b23803d1a0d16b18fa4cfd15
font_02_sfnt_off00016a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A4D 10356 bytes
SHA-256: b2a8818b09bdcc49ca8b485134b9cdb64ab8d430574e56adce8053ad66115ff0