Malicious PDF — malware analysis report

Static analysis result for SHA-256 43491e07cc6be90c…

MALICIOUS

PDF

59.7 KB Created: 2021-05-19 22:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f37ea377e74541f8afc97c063219d92 SHA-1: 00db009ddb0e5320284e604fd24a9a28809d4299 SHA-256: 43491e07cc6be90cb8aafaf019f97fa8bf85e19f549c5580345acf1303e433db
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9363

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://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/660c6407b29d861c13f4bd73df087dba/25944468688.pdf
    • http://slsnn.ru/content/file/gokozulizenobarig.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/47c984e581585f44fe4edb581853e446/monapiz.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/10a68e361f38254c866eff622851375e/83784850528.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/97cab541d33106722153578a2110cdb2/tukixus.pdf
    • http://limitlessillusion.com/wp-content/plugins/super-forms/uploads/php/files/b57e1f3c0447518f7f67aea428a7c821/gebeta.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/7a4a0ed12976d4d9e35dc371846f618b/79897139261.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/7449a1da5c0d069e3dd58c976002367c/76220148412.pdf
    • http://zabradli-znerezu.cz/userfiles/file/33324096486.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/5ohl76889qiusoc3ners4s6co0/47338529621.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075886b342f8---41644123675.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/712f2e4c06f40f2bc6320a862791034f/digisuguwewu.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ceccc74db20f74c23871e064a227e24d/938019389.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/78ab675f2abee4528e51ff34269a299c/57700371861.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=norma+iso+27032+pdf+espa%25C3%25B1ol