Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c350b78b58c01cb…

MALICIOUS

PDF

58.4 KB Created: 2021-05-27 17:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d49044a2e38d0d63381ed460531627eb SHA-1: f40bcb9fa9ec4c80b7023041aaa976fa73312778 SHA-256: 9c350b78b58c01cba0a4c9ca9f4f741ad0e86106c49a952d4101d1d357168c6a
154 Risk Score

Malware Insights

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

This PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8329

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d3bd4b7c---ziwalumerebixede.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c5288ee818e60f51b832fc949d4b0740/35846699176.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/14bltfa20qe7j2r73ktue94acg/dukup.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160770f1a48a46---32180632473.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/e3fc0f0e6ff91b5d2d38e50ee51499e1/74529288428.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec79c43224---xewubulixerawokokalu.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/insu0u4nnv3ojspu0uf600n4m1/maxawogurakitejanof.pdf
    • http://bigandtallking.com/userfiles/file/mejudi.pdf
    • http://www.awakohchang.com/image/upload/File/uzidafun.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/b1cab1630f958c6ac8a203ae8fabaf41/77459011030.pdf
    • https://mariellatriolo.it/public/file/63985858809.pdf
    • http://fitviewer.de/files/file/81113788089.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/819e1faf96245038233d1f7d7b8b660b/zuvavorokefewarazirileta.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609b53285c6dc---wasojija.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160720edd27a5b---18344181380.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/213cb2cb68e88e583deca612d300df0f/61542924896.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f8142c825---13298732786.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=wing+chun+dummy+techniques+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc17.bin
db715ac5a80653bba5aa30b0c3a3b20975248861444337bd85dcb2d41186045d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC17 5472 bytes

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