Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fce7eb144efb22…

MALICIOUS

PDF

184.0 KB Created: 2021-09-05 14:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5f35fc762f52e1e8d8ab14f335387d10 SHA-1: 5bbf58e42835af4ce9936cfde6c2f0bfd1e85e66 SHA-256: 45fce7eb144efb2271b84a7cd2599b7a035b9f884326e7d1ace32f77fa684298
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8318

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 http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6734315af---24407281082.pdf In PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/fidivadixurukadawud.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210710082423_zc28g4.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/eoo76lclmdfg1plibaplpbdkd4/vitajakuzanisot.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd48cc1e34---xidesisakarap.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/17791975186.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/991a51448560b9ba6d896581cd54da5d/21902210196.pdfIn PDF document text
    • http://dc-536514926e84.632.ch/ckfinder/userfiles/files/70630586306.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site//site/data/files/84480056553.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070511d3f842---kudidotizugojenokumabe.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/miginuron.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/0173a4578d5f9e055c60351b840971dd/bimixopofagubuninef.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/gawibara.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f0c576928---53390755113.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/popimemomobu.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/38448106845db3dca6a5e268fb7523e5/wogujeratizidat.pdfIn PDF document text
    • http://foxhill101.com/userimages/55074673494.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/mizotobilokuz.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/49924795676.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160851c0cedb13---povojebij.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/32531189467.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/33602756179.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/8e88f46c80aed2f4ada16bd2a5b324a8/44038566238.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/oierljidb1qbridtf2qfs6goj4/xopepepopezolalutoji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=manual+de+interpretacion+del+wais+ivPDF 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_off0002b560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B560 10752 bytes
SHA-256: d2d20e20e24d324b1e27406d88043092482dee490e8b921146fd0c64bf5f309c
font_01_sfnt_off0002ce3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE3C 16160 bytes
SHA-256: fa5cbea137587b1d4bb1c548ff3f8d17a18587fe273de630a8d80f12e69f99e4