Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e712423ad795d4…

MALICIOUS

PDF

83.2 KB Created: 2021-06-14 02:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 725fcd4b17dc39e74e6c13bc5262bcb5 SHA-1: e4dddc2e826a9bf03b6d29baec2d6e223cdb3f52 SHA-256: 24e712423ad795d4d8e633aa3a3e88d7f7a07a86662c93cc26a6c92feaae05bc
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Vernier caliper test questions and answers' to entice clicks on these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6742

Heuristics 5

  • 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
  • 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://nomylo.ru/uplcv?utm_term=vernier+caliper+test+questions+and+answers PDF link annotation
    • http://aucoindeshalles.fr/menu/file/lidowoxabowana.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0440ff03e2---tagokudotafodofob.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/1d3921c2be8492817bd45c43173e4afa/telebofaj.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a020dfe7ab7---ravomobilubirexopipisese.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/75958367241.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/7be4ck5qb76kpl8ildrb7ad22n/78916164663.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/46792291821.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/64064358425.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d9ee5b64e---jowujizilekubupenedak.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070704fb04a2---71563506055.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd507ccf92---gevalazazasomupimuwaket.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/luvozitiwibujukoje.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/vitoduzezuzulidatesu.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/witutuxuro.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c1cba02b4---rodunav.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C61 5248 bytes
SHA-256: edad4457ecb31d203fba466d520c3e73e8536ae2fcce757339afcf11aad5035e
font_01_sfnt_off00011e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5A 10864 bytes
SHA-256: 61e98129fd31dcde14dcdf4b6aa64104463d5a54f4671f5f591ec1e80fe9627b

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