Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a23da1ded1f59a…

MALICIOUS

PDF

85.7 KB Created: 2021-06-30 23:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1befaf2fb0908f0f27b03e87a7108930 SHA-1: 9b39488b4c44baf2313a2b47c6c870da8d2cfbcb SHA-256: c1a23da1ded1f59a4934f2d7c87be74b9ad7780c1ecc5725d0157153d5a090f6
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content or for SEO manipulation. The file's structure and the presence of numerous external links indicate a likely attempt to exploit user trust or search engine algorithms for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/b95f8a8362cfe12841efe8614243d97e/90120998785.pdf In PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/0b0449f2e499134030b550ff300d52e8/25390031699.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mkjh7c47gd5vbk88c0epv7a306/diwiwuzugopas.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/betowokevoz.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/52168086540.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f379b4eb8---babakubifowakunuxew.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/775a709cba4e60fd1def5f8998a7f563/97705841162.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/xavivu.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/emg4p4ide7maf5ocrgaem4bd70/6716890937.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///lafepisafavijag.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ike97280324p6naarrg28nof7/banogovida.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/21621848388.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/7j1vppqfoqb82rs0ldkd656p39/34677162740.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609f514405234---jexotisasadur.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/489eed3f27269e7691c526bbbe75e9cc/nejaxofotokas.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4fcd05be1---1393271473.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f3fff34c51587ac2811249541db68cc3/pawokavag.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/8be622aac31012e1d27c3fdf69399a65/xubexebelopebezagokutasog.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/17o0p5j4dv3e05bvokvhrs64l0/rolexino.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d09fb61916---85237157926.pdfIn PDF document text
    • https://noddy.nu/images/file/30266489178.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/zovakulemubotum.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fb6f447fdf349e67bc90297738ced97e/82313027531.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/82407150040.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/emouuklkg3ahaf85jnhtshktcd/85967315953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=science+non+living+thingsPDF 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_off0000ed31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 10388 bytes
SHA-256: 4f5a630edb652caef04bae0374d3ab03da5c419464e019426ef19f7f1b8d2ac4
font_01_sfnt_off000104a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A0 17220 bytes
SHA-256: bc47cc64805ece18d0de0a49aaca6e12d9185f02418533801ab05e0138d3a453
font_02_sfnt_off0001319c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.