Malicious PDF — malware analysis report

Static analysis result for SHA-256 e987469b00752221…

MALICIOUS

PDF

120.7 KB Created: 2021-08-10 01:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4db3531dd61a068461daf2865200cf91 SHA-1: e443b14cad009bbcefa5fbcb3c6f8948fd50a59f SHA-256: e987469b00752221b19fbd957b5f85ee7716197b6aa1c9df1f213ed597eb19c8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded JavaScript and numerous external URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8857

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krisoc.ru/uplcv?utm_term=the+odd+couple+spaghetti+scene+script PDF link annotation
    • http://vienhung.com/webroot/img/files/83418701469.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3ab14d5cd---delufe.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a20d661a926---72127671031.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c66f11359ca3bce2fbb9d3be7a95fa6a/bupuluni.pdfIn PDF document text
    • http://apcmagon.com/userfiles/maruvoxomama.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/64275144568.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/53f470e5981f0e072a3834ae127e645c/27009890762.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/petuzuk.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752893588dd---vajowibodip.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/rifepatuligigininobi.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901b3fc33f7---dozega.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e04a43568---tusefobegowajakujorolid.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/mikebibujafus.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086ac27d5561---vemolijibavov.pdfIn PDF document text
    • http://iwishop.hu/file/nolojunamebi.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/wikeroxefuf.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/31384832119.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9a9681420---taziragabase.pdfIn PDF document text
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/gusinameludixunuw.pdfIn PDF document text
    • http://elearning-chemistry.ro/userfiles/file/61326814152.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/kuzakik.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/221hiju1g4of2ni0ekkqvchgi1/34674138411.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/68482084803.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/mojizutamerodewagifop.pdfIn PDF document text

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