Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d4f1b42e44b774…

MALICIOUS

PDF

66.7 KB Created: 2021-05-26 13:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 845f50537111e30b58a1da17ee497c8f SHA-1: 6588b479b731b83bb885828035d70fe8265e0281 SHA-256: 17d4f1b42e44b774d967dda970c88c617f80d0d6f7c048181c3f84114ed981a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous external URIs, many pointing to compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, and the document body is heavily obfuscated, preventing a more detailed analysis of its specific payload or purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

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 http://envigest.cz/upload/file/78209436123.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094153a24d87---lalajevogomox.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/3d00cee087a38f1118862ec33efff030/89804550067.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/ug4oltclospqtrh0gmdpmv2m63/faxovaxupavezet.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c0611b0d5931a5d5583f473274873c18/43906613283.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/12hof40kug2r9oq63g6nd5ogig/29944172858.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1d300fcfe---sexegexivowezijupufodami.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/pps6s5jb1h902jh4qbgskugh2l/30773111651.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c912f554de---79171497593.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/f1d04cc28c4026882af57dad4050b134/fukebapupenesuzakomej.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/e6f84c887d07f8e12729f6926c17d1a8/xidebabiwade.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cf5325fdc---28482731564.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/341ce3e8c75c49ebe2e9f7e209664162/sogokogukabevoli.pdf
    • https://sunarchegypt.com/userfiles/file/50241725363.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079c3bb47086---bulujapawulamivemajugag.pdf
    • http://vitanova-cattery.com/upload/file/82834141981.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607afa3f1df32---70583879868.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160902641d71f4---43719713578.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=what+are+the+limitations+of+non+probability+sampling
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a0.bin
b214803610ba1649c7734c8e7b35cd85353384a2863366b6222053f217ef597f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A0 5568 bytes

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