Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95ce3a0c6028fce…

MALICIOUS

PDF

68.1 KB Created: 2021-09-06 14:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e85da49fffcbc91b399c7954fbc62c66 SHA-1: 25ea258ab6f37b2d2cdd6010d48bfbe143cedb14 SHA-256: c95ce3a0c6028fce768d506934d31a7383186ddd4225a99784422b517c45d948
124 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the structure and heuristic firings indicate a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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 http://adimhukuk.com/resimler/files/97493301382.pdf In PDF document text
    • http://kapsalonindex.nl/images/uploads/surepebazasadimafunob.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160820aacbf579---90300014229.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/9rfos53mpnoufc0675tp99rrjp/83184873309.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/gorufekoworonupufe.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/savegotobiwuni.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160907f90cb4e6---fuziwozatufazapivimikope.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/fad6a00f4d3671a2539bd66518d951a1/9529826120.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb96e2b137---kabetolorubej.pdfIn PDF document text
    • http://starsunited.at/upload/files/zoxuvoregokuxidima.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abd4b615a98---20983372632.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc0a3c0d89---22375364373.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9fe8d68c2---nevav.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e36ae5534d4---joxerenezi.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebadaca6cb---rokejaduzizejowedok.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/76053850954.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ba8de5fcf---82470772312.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/34648998686.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/wexozujobubur.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/41238726258.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/donabi.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/26873292573.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/455876363.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/91097273050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=prime+factorization+worksheet+with+exponentsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C1 11040 bytes
SHA-256: 1afbc09d3415715f8da973758701cf05ed4016fcd386926b385899fdf2617fed
font_01_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1