Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbecad246f38e85…

MALICIOUS

PDF

76.1 KB Created: 2021-07-30 07:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5ce1ddafeca1428e0721ca7d5c347b9d SHA-1: 8a53bfec6fc8bf8082b7bb2f0b36f5c3b01766fb SHA-256: 8cbecad246f38e8504f76a0b99bf7832f18a0602563cfe2da0c20792880c14c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9569

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://krisoc.ru/uplcv?utm_term=game+of+thrones+season+8+episode+6+script+pdf PDF link annotation
    • http://intergeored.com/upload/File/solumojapajif.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/kupuwojusolexejo.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e027c0821---15960725593.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/ponux.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/sugekafitatoti.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/86b187a16d02fbcaafea42b07d5ac230/jokonovikixudo.pdfIn PDF document text
    • http://all-premium.com/user_file/files/basizojegixibojosexileza.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/914lursaurmdlobho50ls6dq91/41012922960.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/15735759112.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/22df6e4e3f01f81799ad9026f92989f5/80693362718.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608bedabef0f8---51634784861.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/rufinuwamoluzawodenome.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/0f85ab99ad7bbb453bd523932db79956/robeloxosilover.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc71f4f1bc---subanuxoxidaza.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/gakexuvurikasiwo.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54501870400.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f34da95c3c7---mopafuxiwazafegox.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/57169245730.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/25965464470.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a800d31281a---21805355445.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/7116247c459629765f8a3cf4b388f81d/nomuzalatuzeviwanuv.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf94ce43e5c---93789012208.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00011138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11138 11252 bytes
SHA-256: 7316494e41f9002eb38c0b26c2081db564f3dc6733cbdf29c7798874bba61133

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