Malicious PDF — malware analysis report

Static analysis result for SHA-256 425b55827d5b3302…

MALICIOUS

PDF

287.6 KB Created: 2021-12-29 08:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: d240963e16971089b276115ab5c8f2e7 SHA-1: df9a64b353517c47dfe7e961e13b8c353249867e SHA-256: 425b55827d5b3302dd5e47abad58ae113b1a5930aef18f27c7e4a1a3541183d4
174 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically flags this as a lure for free downloads, likely to trick users into executing malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7003

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://e-midas.ro/files/file/safosoxorazotep.pdf In PDF document text
    • https://infoenergie-loire.org/userfiles/file/98200478726.pdfIn PDF document text
    • http://thaiurethane.com/userfiles/file/nanexaxenumekijubonivo.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/luririzagu.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/a7d815e0961050c750032bce8949dba3/11597479984.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/3469065682.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/58686892984.pdfIn PDF document text
    • http://sibois.eu/userfiles/file/28329403839.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/70195a7bae9760cd6fd0a4b5bb5a5dbd/zudanuvotufazopawop.pdfIn PDF document text
    • http://tzsunup.com/upload/96128511424.pdfIn PDF document text
    • http://klhl.com/userfiles/file/xokite.pdfIn PDF document text
    • http://islaminkiel.de/webmisr/uploadwebmisr/file/najifajuxudalub.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/76751139987.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/35913036296.pdfIn PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/jigipanebafoz.pdfIn PDF document text
    • https://menatunis.com/uploads/FCK_files/file/sulowox.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/37557156857.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/54157488036.pdfIn PDF document text
    • https://steammining.com/userfiles/file/nedolovesadezemupuz.pdfIn PDF document text
    • http://ux02.wadhost.com/js/ckfinder/userfiles/files/99864629029.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/63603271715.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1617c4b68c53a5---71979885922.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/kubuzelibuvozunozevunel.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/vavibusig.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16196527b046c1---duvakusow.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/17153202836.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/RC0zOYPQW8A/uplcv?utm_term=pivot+table+calculated+field+conditional+formattingPDF 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_off0004126d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4126D 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0004290c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4290C 16940 bytes
SHA-256: fd816c39f45b679b496b7064a1379e53442b05947b625f0d573099209b0bbfd9
font_02_sfnt_off00045526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45526 10956 bytes
SHA-256: 88340de391c539fb77673ff40867cdf02588eadf39638bb4c5030e468e96d220

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