Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d3beca16f698de…

MALICIOUS

PDF

61.2 KB Created: 2021-05-30 00:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f1c929ba5eb6b7ebaa6b39eecdb0c88 SHA-1: 2a7bb51c9b5ae7642c6cc3f5a5c3bfcdf5d5659e SHA-256: c9d3beca16f698def28a2f8c22f4712fba34b76d4f984c7fd39af15f24641b7f
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. The primary purpose appears to be directing users to external, potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

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://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076d428a5f98---sunizafozoraporajida.pdf
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/57203930428.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/cc0c9a8da11220eefa533625866d3d08/sazupinodi.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4a3a409db278bde53b6a3d791b706b80/47746398153.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/afc65cd619ae0eba974ad8e781a89653/xunolavorevexi.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/g9iv2mfqj8o59mu8lg31j0qq6e/bovuvawidese.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ajgj6e1s8gc8t35nvkmhmd612v/dudizifalogab.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160841a826eac8---papog.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fe1511b18---xaliwelaxivoxeki.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee2a151d9---88903977761.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/b04631dc91779ff8b98f02790d2d965d/86390672107.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/54083db472d41daec28a6bfee530beb2/sawirewopabijawulagaleb.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/e983vobr6vsh3871hq214fou8j/15733091391.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/a693570a1da709ce3f0bacf933e112fc/15475926720.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607960c8b8bf6---vunopetim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=astm+a153+pdf+espa%25C3%25B1ol
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d70b.bin
a892e0d2fd25857714b07be47292ffc570ab34a94e31960df79cd066ef5cd9c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD70B 5632 bytes

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