Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da4306eec035a30…

MALICIOUS

PDF

88.0 KB Created: 2021-07-02 14:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a345c2d44ef7e43f9bd2134763108175 SHA-1: 598f4ff60368446bf4e5b778d02d84a96b4740ec SHA-256: 9da4306eec035a3093f5905e911f490dd83ac18b306e336cd8b7374da9faf552
164 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 or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laiyi-art.com/userfiles/file/39010994940.pdf In PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/4baa414106cd16a75d61f28fdbb67fe4/55982859895.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/mufupaluxipixoziwuwalar.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2a832e6ee---reboj.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/21899657095.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8bec0e6ae---60262591365.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f88c9241fa---toturipobexerev.pdfIn PDF document text
    • http://summithighschool1958.com/clients/71652/File/birowifixotanuzuw.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/98cec1cbde172834ca372897e5ff6415/waxupasanupawikomateza.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/bc2fbbcfeed3639b0ad7c13e4b32cef3/tipibunuwemovujawewuxe.pdfIn PDF document text
    • https://denimder.org/resimler/files/wamuwafi.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/48508118243.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/681d1cb332bfacc038e8aa8123669bb3/mowawomosuwogewogib.pdfIn PDF document text
    • http://gdaniec.com/upload/files/kadasifupuzadifaki.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/72705199598.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d62eada58---wukabisedapawezirow.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076569c33f21---59193617802.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607379bde032c---65633543340.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/b8d7c25d565444f4b57020d63a50acfc/supudif.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607989ccdb749---gisixaw.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/mewadekofa.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/leburegu.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/37347877669.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/abce404813f9dd26d66139bd9c45e6c0/52451712650.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/b18s6k8b8ph1067vfq3bi4gguj/8054808471.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/reposogugogumaximo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=video+indesign+interactive+pdfPDF 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_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 17164 bytes
SHA-256: 6e0672a62921ae85599d89627a7ca142f57e9ec1c53c79b8f9ac7b72a7aa3547
font_01_sfnt_off00012171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12171 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13988 10784 bytes
SHA-256: 50f4488e319c7e9eca70a599b324d2a27a50ef332056f11480cdc97fbd4220ee