Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d7b4b510530556…

MALICIOUS

PDF

67.8 KB Created: 2021-06-16 04:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c33482901b47f1f111082e8ba5868949 SHA-1: 924a049dd1ef83169b24c1614b46ddae6ee59f17 SHA-256: d2d7b4b5105305568e2ba1d30d6778a903421241848c8dcc0de4480c07e40e4b
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to compromised WordPress sites, designed to trick users into downloading a malicious file. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URLs suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9722

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://drafthe.ru/uplcv?utm_term=download+song+happy+birthday+to+you+ji+mp3 PDF link annotation
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607840543d473---lorugupi.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/8d84a58576388a82a69b71691961207f/1518675720.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57ff99c6f3---91233019770.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/toluzapofovodiluwotad.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/zitiwuzuxerituv.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990373ec6e7---42549363959.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/1079608643.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ah3n7cgpurqb38ae6ngpgl37e2/55188952016.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/339d53d6b1108cc446854e2ffe5447c6/bugefixizirutepam.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/14343617175.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/66667321458.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f58be2540---porijite.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f29d7807c---77801882025.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/dafodejikojolurewav.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/dapowedovuro.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/3717756636.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/705109d7b278502880101d8ad9bf3784/tepugadozo.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 5948 bytes
SHA-256: 7f82e253628f653b3241bb4ef14d652bbfaa7df0ca4084c2802e0ae78bda332d

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