Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb8e74867f93869…

MALICIOUS

PDF

65.2 KB Created: 2021-06-20 12:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d236c87b23ed6557499f96ef372bdf40 SHA-1: 7653969e01c268e792607d74b323e4d836c21358 SHA-256: 7eb8e74867f93869442290963fe263df36c5195985aa977fcd8baed7e9422d71
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of its specific intent beyond link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92580a815---tixukok.pdf
    • https://xlspandoek.nl/userfiles/file/27141958211.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06d525109b---rojudunewipiki.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6aa6c3f0c---2697191882.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160865ec91f337---45936943744.pdf
    • http://marcelponjee.nl/ponjeefiles/file/99112796004.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/23qnbomh9mob0crsabdi3167i2/vapapuvopurofo.pdf
    • https://aduanaldelvalle.com/userfiles/file/24212026038.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9d34f19dc---madagari.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/9aec7e7d2b6ce3e70afaa5d73be75f26/vasijefolagovapogowobav.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/5mcevmbiufcrj3adukgagm0qj6/rinamutodovepozapelo.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160762ad45063c---83522707147.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082349c019fa---nobupe.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/bpdstsskn2kqh48gmidm18u4rb/3912190405.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608991cf3794d---40481215975.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/7db4bbc0352e6bea3b7b6fb36194e7cd/xusowudodajifamupa.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f29ee1875acdb05659bed9192dd5178f/putibate.pdf
    • http://ownlines.com/upfiles/file/vamusovikenasebivo.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16084f504ad573---nosefuvuxawa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=album+song+tamil+songs
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec70.bin
8d6bf8d1f24104bdf27ba5ca8ba91c3968ec10461fc53a9a08317cc348beaaa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 5040 bytes

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