Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d6dcf15147afb6…

MALICIOUS

PDF

64.0 KB Created: 2021-05-19 23:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94c41bf405f5aeec3f2daa6c81c9877e SHA-1: 4d1d45c5585c2ce0291f57e809ad7a406b1636c3 SHA-256: 96d6dcf15147afb652de8fe8668c193b7c87214ee1cae6062be277d2970ba0f1
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 and an ML classifier as malicious. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or utilize WordPress plugin vulnerabilities for file uploads. The presence of these link farms suggests an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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://catamma.ru/uplcv?utm_term=hayward+pro+logic+system+manual+off
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6d32bd999---25290928374.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-5-4/20210504161506744864.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098905085687---bonanunuxopevuzunib.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/08ef1d35dd3e240778518f7aad54ba7f/fimukonaper.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160755fc166496---gunori.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e3977b3f2---68399417040.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa9bbce0dd---76008008376.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854a285f32a---38985886214.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/qcd3e8tv63s1ea4vg11qlpu5m6/dilobowolegirudi.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/d6bb40dddcb47dc650f8dbf9e744119e/gapakuwetizakuzeposeb.pdf
    • http://apexnepaltravel.com/userfiles/file/44059525647.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a3caa9bfbed18dfeab7a2b7a89c0f528/11941892662.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1608263727c4c0---96689311574.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/4537473e5da915cdf67461ec94fa029a/sudadozebiwaz.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed36c963b6---58623493484.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcfb.bin
1044b10f79c7d4cddc9772138da8b037ad9fd0a5cbc6bab75ea6e69ef043ceb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 5632 bytes

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