Malicious PDF — malware analysis report

Static analysis result for SHA-256 70202bda12f8cd89…

MALICIOUS

PDF

80.4 KB Created: 2021-06-23 06:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0d8330be45bc2f061ab6514e9e9481f8 SHA-1: 50ffec8e98864c308a663337560599de28ba304c SHA-256: 70202bda12f8cd89ed86e2f569a9a1c5dd5cbe899c8fa861a0bab450396f248d
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8157

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://medvor.ru/uplcv?utm_term=e+commerce+question+bank+pdf PDF link annotation
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe0b4e1de5---15966074514.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160748e185d0d4---90518656355.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/2562920658.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/36919725551.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/38472525577.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083925a64566---96689018095.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/dfcvlgb7osds70c66dk4jmimvl/93383054764.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/fodabigi.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/0bedf62763544acfceb55a6087a1061f/42924141142.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/7e5bdcef1c0e644c0f60d1ddbc966e28/mekasetasoxabe.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d82fcea69b---38528521962.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab59c37333---renidiwipixoperij.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/33e867e91edd5f1d5b7f40ffeb3db290/dimosege.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/nuwaxajezo.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/c7ac709db77fc72a8b91f67cb40c238c/dovez.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/nizanudofi.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_off00011e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3E 5556 bytes
SHA-256: 24782d959893aeaea6a3cf9334a1f3c0c008ce749f31159fb0199470c0fba190

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