Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d43267ddfa08c9…

MALICIOUS

PDF

84.7 KB Created: 2021-06-26 11:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a8f2ee5325703268a44c8e43e99f9410 SHA-1: 748eaa941069ab287acf92e658f6c718fe4828b1 SHA-256: 26d43267ddfa08c92cffa351519b8bc823d2442b82558cd715fe442afa715cd5
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/dfp3aqtqpp81iompcuedvp8p04/91160433231.pdf In PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/18766837979.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/gomoruxuponizovoxanopune.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160803eb67d939---61036982264.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/9f05c43c531faac17eb4e89b3dce35e7/13060662170.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6766b5611---7999435726.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/302ceed70524544d91e12724217c3eb4/70042197428.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021050219293061.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089c3302edc1---sijog.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c7733b417cd---saludakagomefutozojifu.pdfIn PDF document text
    • http://matras-devison.com/upload/file/bikiperir.pdfIn PDF document text
    • https://malikcolsys.com/userfiles/files/sosojevatogasopobasuboza.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c28034e0547---97463827736.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/96450392181.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e457e542---63492408391.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cee477b1c2a---13544331963.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d904a0e13---kufurigofebapesu.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/10583172234.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/73mcfhmr6o9qepaebklkikfum0/zamizuvikononegon.pdfIn PDF document text
    • http://cpils.com/userfiles/file/80231741799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=write+reference+from+websitePDF 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_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 10508 bytes
SHA-256: 2a80d78f5f5b65908f738d628e3835930f18fd19b2273a92dc2c5a23f0ed7a01
font_01_sfnt_off0001010c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010C 17612 bytes
SHA-256: 8eb9b99e7da1f23c31ce63387902489aaf786e3b379dab1a1477d1341656f722
font_02_sfnt_off00012dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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