Malicious PDF — malware analysis report

Static analysis result for SHA-256 7223ee2f9addeb8f…

MALICIOUS

PDF

59.7 KB Created: 2021-05-17 23:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56bc0dd44745b6f18c6d79c2a854c289 SHA-1: 941405bfc501b29319a43c00c8e70f474e28a5c5 SHA-256: 7223ee2f9addeb8fa8f82ac9c1f600811706ca67507c5fbbc76004124c21c96a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

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://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/d2c75bd515a21d705d412a03c303d36d/86413297941.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084193e3cd8a---6732426733.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/ddc5826542613c88937bcfc1b97cc74b/mugano.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/774193cb4b428e460d1e001da480d3bd/81156399736.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/322f3b3a8d3b23feb0c7859918142e59/perefoxatozexujimuluji.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a937129fbb48d5f1ee147d9d33956ce8/97704124185.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/7ac2vss419g2m0cpigivieu7g3/wudefepoti.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081a1b65d0d8---81601532383.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095ae0c0056e---witorofosi.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/rlqc5873dobb440nlc9vlm7qaf/45305931219.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ibl04u09vu4l5hqrnmgrjk7sg1/gugefat.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/f4a92d7ed75fbfc568ed46457a035e8a/bopuz.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16095f9060fc2f---rabotatis.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/f9fa99729e0472fff4f46470ec143545/lojuwe.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/l6a78v8rb19f5dlm1jkfto8eab/rudapamazakur.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=resultados+becas+primaria+estado+de+mexico+2020

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d62a.bin
ddf1829a3648d47e9eeb0066b7a88584ccfa5b9b3a4cca0ebd733e5f01658cc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62A 3548 bytes

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