Malicious PDF — malware analysis report

Static analysis result for SHA-256 764ed2d01df2d18e…

MALICIOUS

PDF

72.6 KB Created: 2021-08-05 06:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fd5f6584c2062276b4a1b29bd5f21f06 SHA-1: 82b8d039c96778ad9f4af3f176ffacafe7e29679 SHA-256: 764ed2d01df2d18e10d3b12ac9998893446cdb1da83aeecace5caf9c01eb540c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links to compromised WordPress upload storage, suggesting it is part of a link farm designed to distribute malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely using a PDF as a lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.2226

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://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd33359f1f---vudanelupikagilo.pdf In PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/836819dc3f06cdb10665420b2c9f918b/duvekanafokidi.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/cr1t8bhvjtdioebipkhkgdkjt4/91608263800.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/08/04/ritena.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/6ed72bf6ebd117b9487232e5f30e3013/88374066267.pdfIn PDF document text
    • http://centrons.com/uploaded/file/68385703060c661d529219.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/dixusapipazepa.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e32a9bddcd1---lefol.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/dupoloxebajojipomexizu.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/89103434134.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/vopagiraka.pdfIn PDF document text
    • http://unsersohn.ch/images/file/pigugilo.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/503247572c955cad22d59707d1f47247/34342194605.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/77517750318.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/kelepolomajebiwekasojabe.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160833c58077e6---69233118493.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcd29a1d6d---nepunugejasapexuwap.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ee477d1703f---laromodopaxadowupuz.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0606b6f56b---lopipofuw.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/77143305146.pdfIn PDF document text
    • https://eubeer.vn/uploads/files/96291808896.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/savitutejesusova.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fd4d0581d---getipurofuzeve.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/57570929085.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/gopevijigutowobogeraf.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/fodomugunogojag.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/50c67b7bfd9b2104f175651b9603700f/risatufifanowivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=dhruva+telugu+movie+download+hd+720pPDF 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_off0000d04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 11216 bytes
SHA-256: 85eab5514488f3263255d52433a66f574d4a31f2d22f3271c94d7c56bd912ca3