Malicious PDF — malware analysis report

Static analysis result for SHA-256 52fa8febbd6c58b0…

MALICIOUS

PDF

74.8 KB Created: 2021-08-25 06:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 78110cc536a25f45b0411babbb21dfe2 SHA-1: 55771de9e743864aa0e0a091081bac243393d8c1 SHA-256: 52fa8febbd6c58b0dccfbe466acff7ae8c528f739ba8872b01a169859bbc3fe4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this, indicating the file is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8530

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://garglob.ru/uplcv?utm_term=economic+and+financial+analysis+of+projects+pdf PDF link annotation
    • http://frutapacargentina.com/ckfinder/userfiles/files/jukim.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/lekozona.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/zujaratojewudelaretaxani.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/mufigigogesazanexoj.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072040771c0e---xamonegobalidofep.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6c8b19e47---zapafibes.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/i9d0s4dhjpcic5jdrs0dfqkosj/nonapakewiduwimeta.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607960acc72eb---pewivab.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/6085548130.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161119f08c5f1d---42807065026.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3f00b61ad---43154210880.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/toparepejabunemizor.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1610ae18332c01---86455823730.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/biwazilanixemob.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e347e8be8---mowojesibapafepode.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160811ff4e344f---piverekof.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/60772932519.pdfIn PDF document text
    • http://goref.ru/files/file/16601279463.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/057e24230e30fd1e860b632626f5c2be/dofarofobelemugemuma.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a670ac46aa6---44396223611.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/k9551plhq9hr4s5bjv4sac4pu1/81656212594.pdfIn PDF document text
    • https://airbays.com/userfiles/file/31005237298.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD834 11008 bytes
SHA-256: 746b454323efc07aff091f1325bd1a07b7d3593b0de6eae8dfa4a36f8872acae
font_01_sfnt_off0000f1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BB 16200 bytes
SHA-256: b95a2bd957f1b223632d10ac402b0077c722cdb6af8b6352c1191abb9f5d6440

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