Malicious PDF — malware analysis report

Static analysis result for SHA-256 13269fb237fe5c68…

MALICIOUS

PDF

91.4 KB Created: 2021-06-29 19:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 223e64dea4a22edaa2bc44126ce4d295 SHA-1: 86f87fd64d7355fbf4bc86ccdb1f546044cccb8a SHA-256: 13269fb237fe5c68d0934b40643ddde21f83e8f39dfd711e522482fe4f5d0b64
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URI heuristics and the PDF_SEO_DISPOSABLE_LINK_FARM rule further support the attack pattern of using a link farm for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8fe66759d4ec5aaf0b8b23fddbd6e010/49429634173.pdf In PDF document text
    • http://chaitraglaze.com/uploads/mapazu.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/v26eaj54l6rpbtn8p1uhdk40uv/74419644066.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/10492366739.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/dbbedbda16f28399826b3c78849c9651/safot.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed9ca64d87---pafedevubukifax.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/ebf8c63687eab21486efbfdcb262af93/ravenaji.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/62773471869.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/82262467749.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/gspqmu4b1t3k70vs53c7ajea3r/mopikodenaxaso.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/rutoluki.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/2a7a9a7c94425decdd6ce884b05be0b6/bubozujililuwovap.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/c69e548f37bb8d5400c2a75d6c3b7fc6/63466553095.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093caa613b44---noganevawunixegovosiwal.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879d9c0a5cb---kajatepaz.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f21df17a0e---16290360865.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8178c89885---wimulavilalomototaj.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/c7c8ef2295f12707f772ecfc5bdc6284/10199375907.pdfIn PDF document text
    • http://apvn.info/userfiles/file/xonozovofu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/05cb5c153fedd09ba41903d052a128e8/8925415289.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=appraisal+self+review+commentsPDF 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_off00010069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10069 17340 bytes
SHA-256: de9d73702bf41eb9badb38bee81b7b9377070b8859904fcc0be5e5b0b4e6f329
font_01_sfnt_off00012ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14604 10776 bytes
SHA-256: 4469c471f55924ad6bf8112b9761409025e88d8b784feb69d919c7dc30fbef28

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