Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5a08590cac055a…

MALICIOUS

PDF

59.4 KB Created: 2021-08-01 06:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d10765244b6aec41a2d95cb4596e15a5 SHA-1: 7e63f4eac32babfa66fd3bda1f8b2b1d90cd075d SHA-256: cf5a08590cac055a29fec8d81536734e55370c8353af97507c2845d76110eee5
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external URIs and a link farm structure suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8949

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://vasantviharproperties.com/userfiles/file/metawekokagazokubixebil.pdf In PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/346403062ef60d104ecc0eb626b6896a/9349736102.pdfIn PDF document text
    • http://soupworld.de/upload/file/28591284393.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865679b35fc---6427656070.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/61823512022.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/tasafebuva.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/3cb43ac44866db5fb910d27f308dad15/salepobupigivorowedunaba.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2d95239b74---miwilof.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/bcb8a09ea4025825ed2aadd5f0fbc52e/fasaxe.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/07a2a48357b1c749d8eb843b9ef23f8e/11317831871.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/lowuxiwuwisekulon.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/79880361360.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/eb1a28634a23090a3ecd21b64f7b9baa/gonegakefavetizusomawogap.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/1f1c75c8f67bea8c785aff9544959061/87481375902.pdfIn PDF document text
    • http://ladue69.com/clients/876446/File/rolelerivujidex.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160df14edad166---46369554361.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7b15acc7012db172186125c50747e997/62432537540.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cebfc5203b2---sokus.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/8e2k20b7tk4jfs6spv1if6b7jp/tanupatifa.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b94206d430---46549312827.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a2d8b2033---27100790213.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f42b22d1fb---26587889900.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/g52h0dcls42bqsauumae4ggoj2/vodulururariwagakilepidam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+program+a+defiant+outdoor+timerPDF link annotation

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