Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c3954c418d50b3…

MALICIOUS

PDF

62.6 KB Created: 2021-05-21 10:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e38773e9373b4213f71ebdf5388a202d SHA-1: 1b39b67a4d722c86844d009a44a580c9cc15a81b SHA-256: e6c3954c418d50b3a1ca1ec22d8dbf87d2b111c4639f3fec8ae61632f6d6be44
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 an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites and disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8389

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 https://anmoul.com/userfiles/file/91558275103.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7a377f9dedbaa01e922da386a8c9e4ae/57694216013.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160909f775839e---bitulut.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080454a0781e---2671568427.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/2a09fc2e84137cf99c90735822751c74/39164362959.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6b27be6be---12354993614.pdf
    • https://davaocarrental.com/images/file/20887303138.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742c359f4d4---sititowijobi.pdf
    • https://usssecuritate.ro/userfiles/file/50891608754.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdd5853f39---88176028661.pdf
    • http://nordicaluminium.ru/userfiles/file/fiwujidanulote.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/c1e3fd1a04fb416a4ecb890071953bda/doxozoduguditewejur.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/4ea459e911d6f080947195df9478899f/58055059603.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d2038c95f---tisewinevatoja.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5mv3bdvgh23vpnks8sij0p5dl2/12089636972.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3fa365be1---27193287505.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed3afaeef5---11146702076.pdf
    • https://aimara-bg.com/userfiles/file/12329453891.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=matriz+de+kraljic+de+una+panaderia
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef2a.bin
abbc68cd03bea6e62c7a0050a7e155cd9e243646ab3315f47e8604fe935a611f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2A 4856 bytes

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