Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76cd7930e85762c…

MALICIOUS

PDF

72.1 KB Created: 2021-10-01 02:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 596b522a89adaa8d452e57ee79f60254 SHA-1: 989f3734ddbb935487ce0a3f60020dd729b87ac2 SHA-256: c76cd7930e85762cb592ae95b0c59aab90ff48e599c3795541cf939f35d31044
94 Risk Score

Malware Insights

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

The critical ClamAV heuristic identifies this PDF as 'Pdf.Phishing.Trojan'. The PDF contains numerous external URIs and is flagged as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the link farm suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4044

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/uplcv?utm_term=julie+and+the+phantoms+dublado+online PDF link annotation
    • http://kantipursecurity.com/userfiles/file/34799351447.pdfIn PDF document text
    • http://chouchoudauphongongtay.com/upload/ck/files/xidexebunot.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/93799986559.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210912074531_1716542677.pdfIn PDF document text
    • http://simonide.org/userfiles/file/67108892407.pdfIn PDF document text
    • http://alkanboya.com/files/file///lunamelet.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/mofazaridibetobakukajewa.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/54121156191.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/magovusokomibu.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/goxipujubokusevinamit.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/finawulasagusu.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/gewegozibefunilu.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/jufenafawofobitevotem.pdfIn PDF document text
    • http://freestyler.cz/img/file/buleferulalekewama.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/6893fd5c5efb79479230402fc10405f3/99505943816.pdfIn PDF document text
    • http://cocoal.com/uploads/file/890426663.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/3741861542.pdfIn PDF document text
    • https://signos.larrialdiak.es/files/galeria/files/32751939552.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/dojerolobiwivogogis.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d06f90b86---dujovepukewegapa.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202192361082890.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/xobunenena.pdfIn 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_off0000b8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C8 10788 bytes
SHA-256: 1a5035d558eb7219a06958549dd2703a9f5efd0a5fb3feedcaea7eba769074c5
font_02_sfnt_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 19488 bytes
SHA-256: c6b90746a4caf89857f97f61b916b47157b4540de8a4c248dd3bc19e54f3dff7

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