Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f1d2657310ca0e…

MALICIOUS

PDF

65.2 KB Created: 2021-05-03 18:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 207e764e71539149aa186aa2e143df65 SHA-1: 59e11e1e96e5f95b2fc4fe6da2faec0a8aaaa88f SHA-256: 67f1d2657310ca0eaafef2fe821c810bcf50670789f3432883c70b704feac02a
154 Risk Score

Malware Insights

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

The PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised WordPress sites, likely to host malicious content or further phishing attempts. The document's content, disguised as a safety data sheet, is a lure to encourage clicks on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8993

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 http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800c2d2e9e1---vonitugigoloti.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607862b4d546f---vawetebebinusukaduk.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608508c3847f1---pudinonevojuno.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f414d6fa60---gobakomebuxa.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/c612d5454327643e2cce4da570a2f9f0/fiwokurojuxinesa.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1560592b0---62546467855.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e81d115c---venerozosubitufajo.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/19d3bf2ac59e18415f1a81813ae20fad/73482923787.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077e1ef96201---ziwanetuxipijuregun.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8cd43f749bada775c7c146f842ba494e/60983920565.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/p5budqdp60gcfj38ct52h4bulr/68385960981.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608653c8242c9---lepuvoxilonevoj.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6c809e96c---vodosuzelebopofawezifopo.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/64649gegu1ku0okvv5kj6chrc2/wifepada.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=nespresso+descaling+agent+safety+data+sheet
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce5b.bin
4ba467ed15fd99fce2f003ac32fd41098524ad03a0d12ff399a283e6f1cef33c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 5488 bytes
font_01_sfnt_off0000e111.bin
bf961cf46bf45eb50e2542bf217a30c1be51dcb1f169e57d30b264210ba001e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 10900 bytes

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