Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9d341d4946e6c7…

MALICIOUS

PDF

201.0 KB Created: 2021-10-05 02:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8650954fd4c8b24749c05dd44a9d74d5 SHA-1: 297c6dd6b11fb7ded38609e7df85f95d2a3d8209 SHA-256: fa9d341d4946e6c7cdb62f4a84ec74e78fc62bbe637b4c76d9d30a109969eca1
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting an attempt to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9808

Heuristics 6

  • 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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://archism.ru/uplcv?utm_term=public+administration+in+a+globalizing+world PDF link annotation
    • http://santamariamikado.com/uploads/files/44196413394.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/wugijirire.pdfIn PDF document text
    • http://lmtechsolution.com/userfiles/87163934823.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/37550959020.pdfIn PDF document text
    • http://juentai.com/userfiles/files/tawozulebemopakaliwurobet.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/zuzolagomaju.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/uamf4d9oc6vqfb8d4kvufof9v7/nofowogakimotenegol.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/xogil.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/50516071852.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/92222764041.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/topubavuxopivejigibo.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/58890934918.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/sevik.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/dajutimexipiwegu.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/10724111747.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/mefulesolipogupolewarito.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/87b0037f1edf2231e699862d081067db/9687476119.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/15614578405.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/6786519474.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/r045act25crn5a4rsje5kil704/gupumigezifa.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/23717223356.pdfIn PDF document text
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/17474609760.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210918102205672038.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16157593c9dcdc---10952668075.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002aa46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA46 22668 bytes
SHA-256: 3be8b000112440afac9a8b0f8da1892c404b85747fa1fbe7d9368bcced011af7
font_01_sfnt_off0002e3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3BA 10968 bytes
SHA-256: 273136a4c55eaa8fdf3423985a3b47336cd155362c957563e7c5fd37ba72992e
font_02_sfnt_off0002fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1