Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f83910e97a3bfe…

MALICIOUS

PDF

87.0 KB Created: 2021-06-21 05:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 70a6a2fa88ac5e3d7ec4326fbb40a0be SHA-1: 6b9ed0b29bdc7eac9f139b3d49203f77f21d4245 SHA-256: f1f83910e97a3bfe190df832cf4433a51fd55500be8ac1e85176d3b5aff8525b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The heuristic firings indicate it functions as a link farm, likely intended to redirect users to malicious sites for phishing or malware delivery. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8874

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.
  • 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
  • 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://cructi.ru/uplcv?utm_term=lockhart+mcpherson+badminton+test PDF link annotation
    • http://www.oiseaubleu-promo.fr/userfiles/file/tolexikimojexekawopeki.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160719c0cc407e---91048246629.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/cdceda83b279c1923aa4e2c5f6628d56/15733361200.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/61061028482.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609845313240a---gotiwadolidisibawubonu.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/rimedofelut.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/95033318830.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/s75mgs891e54gk24jljc14v8j5/80994407642.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837ae5809af---34147691667.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/19d00ed253fce8d09dca05bca5d7c3e9/bitisuvamadijewi.pdfIn PDF document text
    • http://nhadatonline24h.com/Images_upload/files/nofubozefax.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/90727681816.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/31663031829.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/892612b0515a5cbc5bca0936e516307e/68526895459.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160adab0b05ba5---22058150535.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed8a9c058---kakedarodikuzotofimod.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c8995b201a393fe4733abdca2a6b9a3b/rizoduwugovavokemuxun.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1763658048---74550140911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C7 5216 bytes
SHA-256: 09bcab5710b6832c44f9efe579c02c0fa7df46754744629329ce03e5fad8c1c3
font_01_sfnt_off00013345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13345 11316 bytes
SHA-256: 5b292709e9620c5fe9a17817c9d2a954fe4227a0027125e95c85a4b2e453b03d

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