Malicious PDF — malware analysis report

Static analysis result for SHA-256 16cfb3727f7df17b…

MALICIOUS

PDF

71.9 KB Created: 2021-06-10 17:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11f961ddf52294e02a23245c83ac7ba3 SHA-1: a340fb7f8301a38fec467cbf6113b6ff421c157f SHA-256: 16cfb3727f7df17bf3bda9543df9124e0aaa1d55d1d512f447bf3404208c1765
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm that directs users to download other PDF files, disguised as movie downloads. Several of these links point to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9581

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://crysiq.ru/uplcv?utm_term=falaknuma+das+full+movie+download+jio+rockers
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/kexedidedo.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/629c17d6f62c2627f53f2bcbd6bda381/nokugut.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/17608c996d0dad8d1716ed2b7b476579/roxotofasevonivazaged.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a54d21e89---taxarimon.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c3a32310f---9775499917.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/xisefifoda.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099c3a095cc3---tulekipiw.pdf
    • http://hasyo.net/files/file/83532614527.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac6cbb9fa0.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3db134750---jomakazokesakezevalagadad.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6ad41ba1c---nenofepapojafixok.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/k6co1a3344s02i2cah8nepir85/sekifonakigexixivafu.pdf
    • https://lawyerupsmart.com/tempimg/file/2456809651.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c1553e5b7---30682807206.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/cfk81ofa5ivnb5mip7vff80ak1/11255905116.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/e60869fadbc9adfd8fbb97a6e50f8d96/juguxubugagezep.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094972daaf92---73259809928.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6a069e66---61283463871.pdf

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