Malicious PDF — malware analysis report

Static analysis result for SHA-256 83969e8c81d20801…

MALICIOUS

PDF

207.7 KB Created: 2021-06-19 03:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 98422cd187deafb1ace9bba69b071f3a SHA-1: cf81523a35e2cb8030c05f959ef9ee6965585e68 SHA-256: 83969e8c81d2080105fcb0fa01c42f2bb17ed551adf457ac8813555508c9e815
132 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The PDF also contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9413

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.
  • 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://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4jv648vqum4amppaa8qk852jrf/volijemofanasefumosezagut.pdf In PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42ff433bc---23684311942.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/nkhp44li957sg9q2llebb6ice0/lasowakoramo.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1608e26d4699d9---nasilixikul.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e678743a53---gulajuzajavafefigimipiguv.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/41827188124.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/kurad.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb054c9b5e---dotogewolesusida.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/du4d49au012hmtapd1lnfletvm/tesasotomujefari.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0d4ac7e58---15895215743.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/44511320894.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b441e715d77---rotefitabi.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/jilaro.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/51c54025827687de49c9c97cf928e46f/69814788143.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01b881aac---53165271750.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa58528e81---88302549733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=forge+of+empires+botPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00031781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31781 4756 bytes
SHA-256: 9379c5476fb610ae34e59e85e285dcbff75c059999261eadd7c5c7684c8aac3d

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