Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cfdbea8f02266d0…

MALICIOUS

PDF

90.6 KB Created: 2021-06-28 18:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0beb5a0a50631b0fad46a2bc8a619c68 SHA-1: 66d09b35a1756694ec725eb254a607b398667276 SHA-256: 7cfdbea8f02266d0a5af13575a9376174aa0e05805685141fde2c1e21f5cd334
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/91bda50693af425333893c30c79ef44d/36921413163.pdf In PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/domedenememivufanegasozug.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/xesabu.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/sirudidefadorar.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/582464ab2be9c151f5396941dcaa7d47/xememivoxeda.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3d9b5d4a9eb36ff7da3fccdc90f0cdbe/23355634794.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/vadazarem.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/f2f3e1ef5f8caec8256cf0599bf40dd3/guwuwivazisufal.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/novoxozirumesinezik.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa70548e02---xuwanekorusoboforul.pdfIn PDF document text
    • https://nadamasristorante.it/file/gatiwujose.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/3830643186.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/2c0888f6a67b5b115940cadea4dc5e3c/2286175992.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/4fee12ad08d3c1a6c75b82ac3e47f446/25837492508.pdfIn PDF document text
    • https://hagepoorter.be/files/files/nonewepuzufitinakefamoxax.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/zatavenexufumunonu.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/fidiro.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/ravexofevuka.pdfIn PDF document text
    • http://attlas.center/userfiles/file/62497179450.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/e7c9e29aa37035b57dc50b570202ff49/87567735758.pdfIn PDF document text
    • https://kuepancong.com/contents//files/watigebitosimi.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/db6ebface3c85da0f8d90e9c9ca730e3/vovotomemukajipeluvuviw.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607c677970ac6---wotesagonumem.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98e2c770b---volokugugowelebesodib.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16094902345570---pumadosaxazifunof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=is+mk11+2+playerPDF 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_off0000fe8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8F 17880 bytes
SHA-256: 36c6c688a91a8dff3e1f8466e31f843f39513c99259de1f1054fae71b8a97650
font_01_sfnt_off00012dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD3 10328 bytes
SHA-256: b51567c4769f4ddbf66c5b0065ba4c4e32afe78407f0de367eb479430285268a
font_02_sfnt_off0001453f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1