Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb6bfd6a6d93083…

MALICIOUS

PDF

64.0 KB Created: 2021-09-01 13:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6cf3d2a1a05c759de90452f1ec945f42 SHA-1: ee9f936ec7d41405aee99c88b8d28705da9129df SHA-256: 1fb6bfd6a6d930833b4a597d53464c3e6f125dc943dcc22bdba6cf564c44c4a3
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 it likely serves as a phishing lure or a distribution point for malware. The document contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final malicious destination. The presence of external URIs and link farms strongly implies the document's primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7899

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://drafthe.ru/uplcv?utm_term=11th+std+chemistry+guide+free+download PDF link annotation
    • http://makassitools.com/userfiles/file///92879759243.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/1eba6f5f21b1a208aa9545d3d853f823/66861754819.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/tezejojupalubelugikig.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/96fbd51c9b2a47722b74809e18e5946d/munigugevagu.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/pulojejameledeko.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/71750628087.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/5e905d9ff434cd5089697058ac1027b5/31411811643.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/dijoruwajeruf.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/90205725241.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c0de4bfd1---jevodepi.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d4638ca8be84bfc16e8faf6778b513bc/45966632765.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/31c8c04e101c5b3479a6b272d496181b/12848253625.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e6bcc68244d6907da7eb3dcbb8261808/xabapusuzesugabesebudiz.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15ffbcb814---62080509937.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16076f045b377b---zirevexuleresadotuz.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/67848369833.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7f42d5e11---gupim.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/7436aff62ace7f3b4d805ef62d01f10d/43454917082.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/34983777542.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210730_165539.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/rjoltee7e30seirkqmtivcqh5t/dumofenejajigususite.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/16880767745.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/63810808276.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/sanisirelugezozive.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/b9gl4rc3cl3qac3rns7gn18146/7452621968.pdfIn PDF document text
    • http://ewtch.com/upload/files/zodovamivepuf.pdfIn PDF document text
    • 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_off0000dae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE8 11176 bytes
SHA-256: 42eedf7278db6a4bac5f8257ee3bdf58d2151473feea7d38d5e7005ecec169ff