Malicious PDF — malware analysis report

Static analysis result for SHA-256 999a3ed96b33a1c4…

MALICIOUS

PDF

47.6 KB Created: 2021-09-01 00:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2493072c48b143f6340f33735d811f3a SHA-1: df145cb831120dfed2f52c7531f84da4701dce0d SHA-256: 999a3ed96b33a1c4140a31456e267fbe575c1564cd557fe988f01bbcf3975f0b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics fired, including PDF_URI and EMBEDDED_URL, pointing to external links. The document body is heavily obfuscated, but the presence of numerous URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5728

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=denners+tack+shop PDF link annotation
    • https://pima-alarms.net/slicice/file/pogizewojevefusu.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/e7e8f74c0a5d05ff0f28c4356b4a2c3d/pegulamipizobuxafozig.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/kubup.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/dc4d6a0cc06f8a69d3b872326e0426c8/33161418665.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7b7e9d7ce---doribasejosur.pdfIn PDF document text
    • https://jurad.eu/files/file/zuwibevusowap.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/86455888168.pdfIn PDF document text

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