Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cce4ecaa08221c5…

MALICIOUS

PDF

91.6 KB Created: 2021-06-11 22:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0977bd31e807f03be162fa4be6d348a7 SHA-1: cfb017dc61577d4a8c8987f94f51205b911a6bad SHA-256: 7cce4ecaa08221c5182e6eb042235d74dcdf0c7c54b3925de7409caf6581aa7d
124 Risk Score

Malware Insights

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

This PDF file was detected as a phishing trojan by ClamAV. It functions as a link farm, containing numerous embedded URLs that point to external websites. These external sites are hosted on compromised WordPress installations and disposable domains, suggesting an attempt to distribute malicious content or conduct phishing operations. The presence of multiple distinct hosts and the use of UTM parameters indicate a coordinated effort to lure users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier clean score 0.2392

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://inwebjor.ru/uplcv?utm_term=kruti+dev+010+bold+font+download
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606da8a859b7a---99602824686.pdf
    • https://alice-immo.com/userfiles/file/17656793318.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09588dc946---kunutobi.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/56e63d0f42783795414af687a985b5bf/77132951591.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8afe445ca---bajebofuga.pdf
    • http://alexlunacoach.com/img/editor/file/49644603044.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/a6cd2c80697f9e7d83c46228a348f209/xugilanakawu.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a3404bb158121b43e0786b4b5028d6a0/12063577248.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/fazuxikadakajujujo.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/65469a097525a59133010b5625c1f8eb/lurowixedaropizu.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/1ed1bb521c0b9cd50a57772221b2c67c/39231044319.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608119d7d7154---64211190118.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ce9f93c3f0fc28aef2c4aa2e846b963d/mizewezanabezonedul.pdf
    • http://kmkonsult.cz/userfiles/file/64309556016.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/bd57b7f886cbda9f5e4721e78250ec4a/rupan.pdf
    • http://caratow.eu/userfiles/file/sokenuzabasaxun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f822.bin
ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 6744 bytes
font_01_sfnt_off0001090a.bin
cb96fb85d3222c79b72d6147091bf12285b4c3e66158ef55c2c1073af486b348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1090A 5180 bytes
font_02_sfnt_off00011ad4.bin
40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD4 3720 bytes
font_03_sfnt_off00012636.bin
5c1b6bb0812a45518fae06dcef2ec09607620a5e26cc3d380d7ef39561b91c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12636 11704 bytes
font_04_sfnt_off00014e08.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E08 16092 bytes

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