Malicious PDF — malware analysis report

Static analysis result for SHA-256 c678f8c50fdc7556…

MALICIOUS

PDF

70.3 KB Created: 2021-10-11 20:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ff67a92b6c4b77c4fe1c899e8eb6e6b3 SHA-1: e4a25dad25affb9a8ac4d85e329ff8cbc769a7a8 SHA-256: c678f8c50fdc755600038dd74d820e47c2c9f2a171ba4f889ae84334e6525b7d
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. ClamAV detection and ML classification confirm its malicious nature, likely serving as a lure for phishing or to download further payloads. The embedded URLs suggest an attempt to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5948

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://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442c72dcfed---sujineraxo.pdf In PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341ae462d65---79510049664.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/sovovukakot.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/timogipij.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/lipenavamolijevovuvusezor.pdfIn PDF document text
    • http://thegioioto.store/upload/files/18501299439.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/detaxuzadositow.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/4504741936.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372b3e9420c---54765957333.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369643d4938---pevagev.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/33577183474.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/fujaturukisawowobe.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/52870441461329ae5c0db5.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140e43739fef---tuzumutusoroxegumijix.pdfIn PDF document text
    • https://tsolisp.com/files/file/fuvafarenabuboji.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/17086299487.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/piruno.pdfIn PDF document text
    • https://jjpremiers.com/files/xubaxijexe.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/24256011664.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/22810993116.pdfIn PDF document text
    • https://alutat.com/data/file/duxisumonob.pdfIn PDF document text
    • http://sooclose.eu/upload/File/niwajino.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/sizij.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/17216266000.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/RhDyTiV0TgQ/uplcv?utm_term=becker%27s+labeling+theoryPDF link annotation

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