Malicious PDF — malware analysis report

Static analysis result for SHA-256 174a17421dfbefb7…

MALICIOUS

PDF

88.1 KB Created: 2021-06-20 10:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a206cd15daa322770b1d47e88092fe18 SHA-1: d966d39e9ed1f5a532c4b059aaa3bb1f3335e26d SHA-256: 174a17421dfbefb700edb81b2d25eba4b96e15e198d8e9ad57e834eb14d59c97
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 multiple URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to lure users to external resources. The ClamAV detection and ML classifier flagging indicate malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis point to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6037

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://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086023947194---13026613286.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/e6203951bf8ead789f7cf9d44d35d324/dotunudugewilavit.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be05f17764---sogubojowuw.pdf
    • http://kawoka.com/userfiles/file/dufazetoxukasovetijura.pdf
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/3702077cb23c0a43d2b9783727db93b2/zuvulifetib.pdf
    • http://quickvideo.nl/userfiles/file/88606063921.pdf
    • https://aprilboya.com/userfiles/file/pewefupekumonabupi.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071f00544c6e---wojawapapekenirisixupamen.pdf
    • http://abcbyspu.net/ckfinder/images_store/files/zowuxawir.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/6novpo2gmc2g1ef7669eaeblci/vaxavuba.pdf
    • https://weddingitaly.jp/images/file/93511958920.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/6ccd224caea1bbdf24ca136e693a08e9/92009530016.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0f6c7f1a0---tetaxerudido.pdf
    • http://rmgoals.com/userfiles/files/zulevubijetenavilefemamav.pdf
    • http://szpk.hu/_user/file/88292816716.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=12th+bio+botany+sura+guide+pdf+free+download

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