Malicious PDF — malware analysis report

Static analysis result for SHA-256 97474871dc2323f7…

MALICIOUS

PDF

55.0 KB Created: 2021-08-23 13:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a085c014657fbda95a04eb11778038be SHA-1: b58221a6cf0454062dff7de2197abb0d04ba2a63 SHA-256: 97474871dc2323f75138b4a40d0282f16d824082c28d366fba4d46dbd5f038ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm hosted on compromised WordPress sites, a common tactic for distributing malicious content or conducting phishing. ClamAV detected this file as a phishing trojan, and ML classifiers also flagged it as malicious. The embedded URLs point to various domains, many of which appear to be compromised CMS installations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6052

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.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70470addc1---wotekosizibesevojovev.pdf In PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f709485560---vodova.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/uitp7venp2a4m6u1aajce4ov26/86310508743.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/q1bd3d7pjq2im12e2i0bo1shl0/jumatoropavusamat.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/619nilak2tgssa54ern48vp4s7/91075604914.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a498e4ca0fe---golarujatapogovu.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091da57208b5---ruvuvavugobafo.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/satewevopupepegajadurivu.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/xaxexuvovobik.pdfIn PDF document text
    • http://sdes.in/uploads/22143708856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=i+like+you+more+than+anythingPDF link annotation

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