Malicious PDF — malware analysis report

Static analysis result for SHA-256 c671c6396a510f68…

MALICIOUS

PDF

55.3 KB Created: 2021-09-08 21:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8281f02f9559128f4d8cc199aa716152 SHA-1: 775b08b2bdbd1ac674fd41d174f54bd5d99fed5e SHA-256: c671c6396a510f68e7af3982683ac5222969dc627730d71d76d4dad7f675d330
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of external URIs and link farm heuristics strongly suggests a malicious intent to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4951

Heuristics 5

  • 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.
  • 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://coretry.ru/uplcv?utm_term=hong+kong+tram+map+pdf PDF link annotation
    • https://grupa-energia.pl/attachments/file/1490930186.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/8858773970.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/gunapunazigif.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/a2ksvt3t1mtuuk0bc183fqdhg7/fipuzozodogip.pdfIn PDF document text
    • https://zzwgjx.com/d/files/39085104559.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/13040264510.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/31093253856.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/24953038966.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/28066521933.pdfIn PDF document text
    • http://tfforming.ru/d/files/rinodopajunurame.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/88071491662.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/34071952209.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/62675267223.pdfIn PDF document text
    • http://normel.org/files/upload/file/tosagusinuganidofume.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4081b51b0e5a4e4dcb57daea41231df2/62263534819.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161375175e1c86---5534329979.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/69682371185.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351b1b1347a---96995618874.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/popofa.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109081015465708.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/5972227430.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/78069650178.pdfIn PDF document text

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