Malicious PDF — malware analysis report

Static analysis result for SHA-256 231c88211786f965…

MALICIOUS

PDF

65.1 KB Created: 2021-09-09 19:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 64a2f9dc3165d0d8f4a8e1faaeefc065 SHA-1: 57c4b25d611b3f9277d3e017ef13d740ebf881c4 SHA-256: 231c88211786f9658b8f8e9a7894163b92787f195c73ce4565c95157d51d05ee
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV detection and ML classification confirm its malicious nature. The primary attack pattern involves redirecting users to a network of sites, likely for malicious SEO or to serve further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7151

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 http://top-caster.com/userfiles/file/82852750014.pdf In PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161354f215ed8f---vezixufafovo.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109031305155509.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/97737209494.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/sogolowewiku.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/gudogexifoxufelubi.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/82365647068.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/magogaxakon.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/9784879801.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/tolesadesozeseduxoxarov.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/koripabuxesarewurubome.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210905_34E363F39F94C6F3.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/87056343697.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/vuburebuzumikuwi.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/22078975264.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/28009568380.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/wubutegedak.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/tinelivogedoj.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/vevegexejil.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210903/2214419500.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/ravidutivud.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/45922242378.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/rotukadilokimem.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/42852999542.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/18946082440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=charlie+and+the+great+glass+elevator+free+online+bookPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3E 10960 bytes
SHA-256: 09e2184a4ef84765c42c3a5c1baf7c725398c7dd393c3ca0deff91867e06de42

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