Malicious PDF — malware analysis report

Static analysis result for SHA-256 733315b75eb7e09d…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 03:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 41a3540c582c6ea9cc80eab803c61c37 SHA-1: 20ed4cdf75d6882d553b66bcf40bff3eb52c1d46 SHA-256: 733315b75eb7e09dc0dc25f0d5bbf96e2d5a2bad11723c2cfe46426c4cf33462
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the extensive link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7931

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://bibliothequedesarts.ch/ckfinder/userfiles/files/5463355082.pdf In PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/485208054662ffd4f31fc747187d9914/77453830946.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160791d923c67a---kesijaxasud.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940cac4e038---72294547695.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/6f89ce319d6723900b9dad8266f71382/33397761167.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161216b1fa2d4d---47684832875.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/6087830036.pdfIn PDF document text
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/kenonelijawul.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/61972152908.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/cad39719c487e759eea249381852cde9/8279628959.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/kedonejepagujozurudesa.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/zavasefokaju.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/lepuges.pdfIn PDF document text
    • http://susanjeske.com/clients/82887/File/ladajoliwivibuv.pdfIn PDF document text
    • http://lukinserv.hu/file/jikekidiw.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd07da0174b---45163969991.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=language+planning+definition+pdfPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.