Malicious PDF — malware analysis report

Static analysis result for SHA-256 0353d421c89cab0f…

MALICIOUS

PDF

62.5 KB Created: 2021-05-27 17:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: f4d82edc8b3239ea23b1189e22de65bb SHA-1: 853cf3fa9a6d8c49ae25879d0947c9ce0a721264 SHA-256: 0353d421c89cab0fbf512c1f72f3f082dd9ba8c055a53de9d35d12b6dbf4e0f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for phishing or distributing malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, likely for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8440

Heuristics 5

  • 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
  • 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://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a92092aa81---gotanonaxerobirexan.pdf In PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a5d0c1d1---69894092420.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/begofifurazezimavi.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab32d644d19---43144274946.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/pi109b0hp75c6el6i2vjj6h4tg/15315009899.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a858b49627---38108160549.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/1ug11ibrq2rqa2qjobv3q16quq/81168144131.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/24tdtpll2l8uuep59dt500rp2b/31957183778.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/736f22d379c1e6556e5be05fe1a66582/mikibibipi.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabbe88a877---nebirima.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608926a48e887---fikotevuxologegofaludop.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb1f67c13e---13979515650.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb6bd5719---47912162572.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/9b8cdd08527f1a55bf4fd2a79e72a264/62180054702.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160757ac8a2609---kilukosu.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/fa8971f38e95681e1dd4fc41865c7780/danupefoduwujad.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/413572786fe0fbbeca8052558ff725bb/balebenopaza.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cec41b1a4---67931649474.pdfIn PDF document text
    • http://jarosi.hu/files/file/32392296705.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=los+hornos+de+hitler+descargar+libro+gratisPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 5068 bytes
SHA-256: fa02a5bd40b28ed3a133ddffe0a972eef48ca3b64901e37e9551288318d4e6e1

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