Malicious PDF — malware analysis report

Static analysis result for SHA-256 d620e1866620c052…

MALICIOUS

PDF

76.3 KB Created: 2021-06-26 20:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 88cc5cadbaeef824fab151055e40d2aa SHA-1: 4034439690a0128c8099a4cc2a1366d3ffa6b6f2 SHA-256: d620e1866620c0525c0a9239e9a4c20fadbcb40fa8c6783a9a8b9dc251948690
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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
  • 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://cructi.ru/uplcv?utm_term=my+ideal+weight PDF link annotation
    • http://broadviewlibrary.org/uploaded_bvlib/file/xavobukujidapepawoji.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/10765579064.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/69477700879.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609013a4d6b6a---kopamopukatibenod.pdfIn PDF document text
    • http://budka39.ru/files/panozol.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/07d9962b2fef8c5fb21a031491049692/dudijijulunexo.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/9711c5d74ec9b6c57fd6c2c919408d55/xanofake.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/857eb2a7fd2bdd20e16c906a3649d53a/lanex.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/sojedufosuriruwisifoduked.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/xerufadol.pdfIn PDF document text
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/sokonukukitasexiteke.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961d7e0e9a3---12401067537.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/59995374753.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/nofiromaw.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a924a5365---2321092349.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160942177d418f---tobefa.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/r6l9g3rg2jgtvpaojvdjcvs3fv/pavazodi.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/eec408c7c684fe219d1cc064fe92f8f2/15883500123.pdfIn PDF document text
    • http://jarosi.hu/files/file/wanazibuworozulujapun.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210602155359_353378884.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/194eccef88224a6568ed1003e8bc95d1/91665707208.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/44821924920.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/34124700177.pdfIn PDF document text
    • https://birotex.rs/images/files/tivifobisokopitorube.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_off0000c9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CB 10228 bytes
SHA-256: 348929f285c88ac870b9d07b42bae0ab04d39099ce44251478a966e8d6d0e64c
font_01_sfnt_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 16652 bytes
SHA-256: 3398c20ab301060e5e0997d3bc89c0c5cf66ac9cf15b9b687b8b0c442ab78a93

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