Malicious PDF — malware analysis report

Static analysis result for SHA-256 c430e50bc8c36201…

MALICIOUS

PDF

91.9 KB Created: 2021-06-27 07:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3b2f1dafc4ab004c1855eccd678d4823 SHA-1: 41af67903e2e26d370f5542925209881a3e18d81 SHA-256: c430e50bc8c36201afa82a1459066cc5aa625623e5bc0002843d2aa6d154041e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/8degqgsvt3cme2504ks54rgso0/pudedurekijiwizu.pdf In PDF document text
    • http://soupworld.de/upload/file/zevagiwavatupexazijuf.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/7703278106.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/xamujorasamiginifev.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/0559766ef76d715b43935e5ed6cd0a22/94736743936.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982eb9afd3b---kuwavexolavadope.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/supudesalelulegeboniniwi.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c945a83f36---50655576973.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/tegefevetosote.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf1aaed69---kidexiladovo.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/32590448937.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/f39d594c49f55f5eb01178876b96fcff/wumabudigukalulobif.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/vabelefijiko.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a040aaf2aa2---rirosagaxabiwaxawiri.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/dekudireropileganusag.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/25226314237.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/7894b804c253b358bab5e48d6703a930/55034454880.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081586ab7e2b---pigekixusefudutuwixesu.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f49b67d5d0---kavudademi.pdfIn PDF document text
    • https://aokman-drive.com/d/files/nirojuxel.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608541a439c81---popolenimojevodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=lincoln+continental+kindig+customsPDF 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_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 17084 bytes
SHA-256: e07988db5cb38c382392bb7736f1d14f98150f258b24518343275c6404e40840
font_01_sfnt_off00013062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13062 10760 bytes
SHA-256: 9e25e1ec8b20e375db8e40a647380aed17dee6c6356a149f10bc5ae342b6626f
font_02_sfnt_off000148ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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