Malicious PDF — malware analysis report

Static analysis result for SHA-256 72587e336c0b081d…

MALICIOUS

PDF

52.5 KB Created: 2021-09-07 13:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fb72d7c79a0f04cecdad44e7d8cfc003 SHA-1: 373aec2de35430bb4d7cfd5fa328750e112a6cc6 SHA-256: 72587e336c0b081d7d8d49a8c95e5b671628dd0d27c6c4fea3ebf717544f02c5
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains multiple embedded URLs, many of which point to compromised WordPress sites. The ClamAV heuristic identifies it as a phishing trojan. The presence of external URIs and compromised CMS upload links suggests the document is designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4747

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://pistant.ru/uplcv?utm_term=spelling+practice+book+grade+2+pdf PDF link annotation
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/49lrj0mbbu18h27tllnog6hlhj/luvawakewukomexesewoxe.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/3acf0beae5712e9a8417972d32181617/23549649764.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/caebcc04ea40eb6a0c0cb49181eb55d9/28865895878.pdfIn PDF document text
    • https://ijaetis.org/ckfinder/userfiles/files/vanovudojufomuwe.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/r7bv4uieo136cp48b6vn8vfnit/mofusipuxamorusumubefap.pdfIn PDF document text
    • http://arslanemlak.com/E/file/bujevifonavulilosabaviz.pdfIn PDF document text

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