Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4f6447341dfa00…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 08:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 20c565a845ca6e33eebe8d06c98d97be SHA-1: aa9282ec278a8622962806d27af21d9297a44730 SHA-256: fd4f6447341dfa00de62aa04c0f4c41b4f26d07c9b5512a6d3f8a55fc4ffadf8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/27brlklsoq1db8qkhnr27f477c/21661378256.pdf In PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f2255e78d---51241243398.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46b1b8042e---26452631984.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/pizetolumutagonisal.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/tuparoderowir.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/faworafomiv.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd1b00e143---jeluju.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/favunukimujosepepeg.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/38974072588.pdfIn PDF document text
    • http://afslab.asia/upload/files/pepoxesapu.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/xiseligazudidexoxe.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6d5e53466---333324780.pdfIn PDF document text
    • http://dges.in/userfiles/file/zozimimasoputuz.pdfIn PDF document text
    • https://beaszemin.com/files/finopemozazetonaxenapot.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/nodonoba.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/g4itbpo929sntnac08009r7t7t/wuxenuka.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/64bfcba9289310a2290a01402c94fe43/davulidufajitolodulujakum.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5ce465b3d8---sumexine.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/62065445280.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bad5afd6408---25565101341.pdfIn PDF document text
    • https://leifs-auto.dk/images/file/dizekesebituvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=basic+unit+conversion+table+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bd29031f1---72447868396.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_off0000d6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C7 10972 bytes
SHA-256: 8937c13af4a298231af3692251bfed908f932e1708350dd83a51bff240f62db4
font_01_sfnt_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 16856 bytes
SHA-256: 87f820422092582683855a9036edb8d3119b72019721b51de9fc4e8246ecf583
font_02_sfnt_off00011bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.