Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7219d5f3fb0aa5…

MALICIOUS

PDF

62.3 KB Created: 2021-06-10 03:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5445b31ac61bcf3c82ff72c857d1ec5d SHA-1: 64b08f434359597e543d38eb33394bfa6d6bb796 SHA-256: 2b7219d5f3fb0aa5ed9537f480a330cbe94aa0b048396ebba1800688cbd73b98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8152

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://philabc.ru/uplcv?utm_term=love+you+forever+by+tasha+cobbs PDF link annotation
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b819e645d2---53541264658.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/vipexojam.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/vobizupunoretafeninixe.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ac54b24a9---fujopafolepiveru.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766c4c54e26---fidomurikunividepudeniw.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/53762634366a79e7144212d43746eb3a/30820986312.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/97276245527.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/vatek.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/98603642260.pdfIn PDF document text
    • https://activepymes.com/pub/file/lujatefufazitekelavaki.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b61dc58621---81100123584.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/borl123tkb4lfsekv21t7i8noq/gekurubobatizoxepetos.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/tirevo.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/d8d75849c7627934d2ec4f7c6e828964/53692505598.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/n4jbs4cublm74beg6hs18cpsgu/jetejiwedaxegewasufunixor.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f32f7b6dc7310d695ce8e2183e0d38a0/wujufu.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/4090572889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD349 4908 bytes
SHA-256: baf525fc0fc0ed7b4bfeae1a6e31d3f667cd0a0f5887b2731d4126a00304e453

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