Malicious PDF — malware analysis report

Static analysis result for SHA-256 f669c59d93219fdd…

MALICIOUS

PDF

73.1 KB Created: 2021-10-02 20:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6fd7487e5f76618967c75b018af2dce7 SHA-1: 35f62b22b0f4ef763a15e79f0c9949b91700470a SHA-256: f669c59d93219fdde13bb7688c2b6859da85c8f6a3e30575945797f5db61d158
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple compromised or disposable hosting sites, likely designed to redirect users to phishing pages or download further malware. The presence of numerous external URIs and link farm heuristics strongly suggests a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e3ed03693c---27860597566.pdf In PDF document text
    • https://signika.pl/Upload/file/15396276650.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210910101249.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/0f6270fec3be3aeb84f25b1539c85a26/57325537274.pdfIn PDF document text
    • https://nomortiga.com/contents/files/nirekudewuzikigizam.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/womurofov.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2aafcf35a6a30ae42d26c38852f4d013/vimosobinibebumariwoxag.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/kefavige.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/57852618491.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/gajelelujunobetoxagesi.pdfIn PDF document text
    • https://infosantiere.ro/userfiles/file/62580294421.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/sobomofas.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/15862498633.pdfIn PDF document text
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/74542699229.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/51563724678.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/mivuvudewuketodurizofuj.pdfIn PDF document text
    • https://anakaygame.net/calisma2/files/uploads/dovexat.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/94b62845c750c4850828ebc55a4dbc60/wozefaviporid.pdfIn PDF document text
    • http://yilbasipromosyonu.com/userfiles/file/60175202469.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/93078325504.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153bdb6c6dea---ridisaroriduge.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021091617260770554.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/09/202109231134257106.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148b7d0114c7---tuvatafupefapozom.pdfIn PDF document text
    • http://leeandrewdavison.com/download/50025988686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=fake+id+picturePDF 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_off0000ba65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA65 10236 bytes
SHA-256: d77599335726cb66622d6d732485e4785e889e232ed597355a98577c55acb89f
font_01_sfnt_off0000d179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD179 17684 bytes
SHA-256: 959861a7b3244796eeb78461242ceb05d8e9b833f3cc61310dbd87a41ed9bbc2
font_02_sfnt_off0000fea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1