Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5be6c599f4c3f18…

MALICIOUS

PDF

73.5 KB Created: 2021-06-26 22:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ea0ca503cb3d0fada3b12c298ed90feb SHA-1: 28b69343c5b3973155eb7421c75c9be79548caeb SHA-256: d5be6c599f4c3f18ee34dd76d1445146846e223216350072e607cb75ee4f7d87
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a phishing or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious content or further stages of an attack. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest a link farm designed for SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7611

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 http://ajtoablakcentrum.com/_user/file/14589186593.pdf In PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2dc85c082c47cd9ecae0c766eb158386/50958155579.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/femalafezikugujaxipapa.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1794e11b5---tojizoku.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/d202cd8759f5c72e1bd74f2f61685178/pagudefemowafodivosasafow.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc3a0d07a5---zopixejitif.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160830c5c6b1ba---78405982079.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921b6f99e82---82740656485.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078250d423da---pavasimep.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/povawigobelalozadedos.pdfIn PDF document text
    • http://4bx.pl/public/file/67625646317.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160c7293617b48---72902875050.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/valobamebowivek.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/bevekasawavabawuf.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/4947495148.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/javememojeronij.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/87216253073.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/e29a6453c132c8791199f0612bc6bcc7/50719173543.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/9f4614fd76b8b8fcefe62793b359adda/18091505887.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/uj3a59mcue2a2bod1es9gluebm/16018304893.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/v5l4e9hlpi8dq8tmitf1a0t8qe/jojiver.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac022a661ae---nebixujumonetovep.pdfIn PDF document text
    • http://szwygs.com/upload/totekapozaweb.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1be98d4d1---bijagoguz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=periodic+table+explained+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 10688 bytes
SHA-256: ef80dc2e1b939b509fff3a2437df8632445443d93edf1a242ebd1961a4746344
font_01_sfnt_off0000fc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 17216 bytes
SHA-256: 2cc354628504731de3b7b6efb64bb3b0cf81e1ad68ad06c764c41af47ca476cc