Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29707fef2c5fcfe…

MALICIOUS

PDF

82.0 KB Created: 2021-09-19 03:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e382c4cc368a920cc141ab916baa2b37 SHA-1: b121bf0dd7f9503c815fae007d2f89b02c5697e9 SHA-256: d29707fef2c5fcfe8134cbf8528f7db70281cc6c7f701e85ccf1da5cd70df277
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially harmful external sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/5v8jtuam14uli4guunghsluouc/vosaxo.pdf In PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/42297895648.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/92641980082.pdfIn PDF document text
    • http://kasargod.net/uploads/file/49057282638.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/15393787461.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16130cc6f21165---ziriguwem.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/66684294ac3a2688046428b51222e240/26156229040.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/nunejowadeso.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18853702506.pdfIn PDF document text
    • http://jiji.pgo.tw/pic/uploads/files/74778629817.pdfIn PDF document text
    • http://www.reeder.ee/files/filemanager/10813479999.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/90979027813.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/49086468897.pdfIn PDF document text
    • http://perksys.com/userfiles/file/bajezadamexepowel.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210903091212.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/tanixejiguvasap.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/xalud.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/sofisotizonu.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/3cqt5pqdfc0g6gsrruu47843ef/73350494202.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/nuxusilub.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae8a4dfce0---sujurugugefuf.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/lenidaz.pdfIn PDF document text
    • http://synfarm.com/upload/files/suvalu.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/33315144222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=matte+painting+in+photoshop+pdfPDF link annotation
    • 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_off0000dbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 10624 bytes
SHA-256: a11f62ae3f486d8bcfda9ac3ad291cff2a1c9b15a031ce374904aff383848b95
font_02_sfnt_off00010c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1E 17720 bytes
SHA-256: eac4feaf7c8bf432758113e192882ed59a2d2a1eacd120e871178fa2ee66cb0a