Malicious PDF — malware analysis report

Static analysis result for SHA-256 346490edf87ec381…

MALICIOUS

PDF

71.1 KB Created: 2021-06-21 02:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd8087346b16d94875573eedfe6e2215 SHA-1: 66568a7c49e17df6ff032e87cc6f958439fd3723 SHA-256: 346490edf87ec3811930e28b3632e7f16cb9f4349d868ff215737c2784ec020d
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7308

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://birons.net/wp-content/plugins/super-forms/uploads/php/files/192e51bccc5affaaa7bc1d895995a4f0/76404783425.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/rn5mc2a2ftqgm61hbe9nbcj45o/56190139324.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/e211d8ad70b675a4993d7f89ad02339b/11188149427.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e35892dc2---dixatikusi.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/f5otnl3fup5a3e6f21po4mon9s/dadutatarasogovowomolawi.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/7j27i57g64gnk9o4mdl0al987i/95025367302.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c353e4fe87---sovoralebigevemugenun.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/dbcc1897ce437363342c32ca55b8a4a6/5774174992.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091091a6c3c7---modijinisemagosukuwig.pdf
    • http://www.sec-ollivier-associes.fr/www/upload/file/56101757328.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad8626fc57---bakibanawudupo.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773138c0850---posusagepev.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baecd9e3c0b---50366679581.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/p083jq0273vvc1r06d15shhi00/82249664826.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=mlbb+dias+injector
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e15a.bin
5fca5ac4ac22a9cc0d857046124becaf7f5f22e60940f67971e392d5f6a02ea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 5156 bytes
font_01_sfnt_off0000f2f9.bin
5d2016c5a196e73b65a66b1089c8370a5a772e06e278d4fb286b778eaac28abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 10800 bytes

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