Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8d005e78b8a28b…

MALICIOUS

PDF

52.0 KB Created: 2021-05-26 06:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce3a29c35ff2d91f010f4b3ae8c8d49a SHA-1: 7bee51de86f4cf64827918c642a75126106e63dd SHA-256: 4a8d005e78b8a28b7ad51cd5e966c63b4bcc9ea80667263b37c2cfc80f737a0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6781

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://synerhu.ru/uplcv?utm_term=julington+creek+plantation+hoa
    • https://kvkumariajnkvv.org/singhania/downloads/file/92633627977.pdf
    • http://lab4050.com/upload/editor/file/muluxev.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160868e36c65c9---fororume.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/84699739539.pdf
    • https://zionapostolicministries.org/uploads/file/85212526642.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/298d3c98693787d3414701d3962b412b/57006202311.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968babcaaee---tatazogasobe.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16084a1c9c35a0---tunivuvitar.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c25f5ede0---76732107969.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/3c581fc259f480ab42a88b4611b55895/bagezorisikabusupere.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/73320122618.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/il1cfslhc123hlbg2rhca6jvfe/minebabawi.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/3070428b90533e4451c3075ec22fdd94/womakudekas.pdf

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