Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc43e7c4e29bf21…

MALICIOUS

PDF

47.7 KB Created: 2021-09-05 21:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9858c14b13dbf4a1e3d35c1ff2d0333b SHA-1: b5aaa264d407d49e78b7f69cbbc73a8bcd76fc38 SHA-256: 0cc43e7c4e29bf2176d9c62f990070bc8cff634f2a406ab65b0dbd605d594651
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 compromised CMS upload storage, suggesting an attempt to distribute further malware. The document body is heavily obfuscated and unreadable, but the presence of numerous URLs associated with compromised WordPress sites and form upload vulnerabilities points to a malicious distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7102

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://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/915bb480a1862b10aa1bd32f14125fec/zavut.pdf In PDF document text
    • http://nitecoreromania.ro/files/file/97986597566.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f7a4f716c4e84e917dc84055c7df86e/gapabud.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/186o9lk3bd279v2bint3m460ne/77448898062.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae07269e70f---11244298763.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1d1a6adcd---71020772947.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/xetemabejojipijatu.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16080eca4509ba---11143192941.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/29359769337.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112ff513636b---misimosukubamune.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/87652474053.pdfIn PDF document text
    • https://mclarenquartz.in/ci/userfiles/files/66446067144.pdfIn PDF document text
    • http://esllearningbydesign.com/app/webroot/files/file/79402689744.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/pebonagodisobug.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/xamam.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/34705680472.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/bebatebufati.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/17467633541.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/wuduve.pdfIn PDF document text
    • http://superpart.com/files/88356919721.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/93985661956.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=word+to+pdf+converter+and+merger+downloadPDF link annotation

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