Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1ae665582142e6…

MALICIOUS

PDF

234.3 KB Created: 2021-06-23 04:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 576c828e1d6072ba19bd4c2c29da9594 SHA-1: 0c6ad53c480242cb87c092d5aaa6472234940f8a SHA-256: 1d1ae665582142e6fcae393fcecb0be836be1b31e22ccfe7ce9441a5a604c2c0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The presence of PDF-specific heuristics and embedded URLs further supports its role as a lure to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9663

Heuristics 4

  • 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.
  • 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://coretry.ru/uplcv?utm_term=thomas+h+cormen+introduction+to+algorithms+pdf PDF link annotation
    • http://eotp.info/sites/default/files/fck/file/fuvelababuvudarisa.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/55706411869.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609697c82232f---silelufebopenagikokamowo.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/44847356002.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/mimifuvot.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/rirawegedelozep.pdfIn PDF document text
    • https://afayl.com/userfiles/file/6877940907.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9db4d6ef0---xaribixizaza.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d026fe451a---50759837957.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/rulem.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/31520730395.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/zupekogodobusaxugaguw.pdfIn PDF document text
    • http://abpaluso.com/upload/file/pabojikiwuzi.pdfIn PDF document text

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