Malicious PDF — malware analysis report

Static analysis result for SHA-256 29773b6371292b04…

MALICIOUS

PDF

76.1 KB Created: 2021-09-03 03:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d9432b4b996bb92d99a729c0aac73102 SHA-1: 50598e7a82d6b4518f1e17cdd38d6fba074ba495 SHA-256: 29773b6371292b040170ebf56f25f64b7ed9b2a51c4e74a7220dd04b2b89d859
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm. It contains numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and link farm heuristics indicates a likely phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://irlanc.ru/uplcv?utm_term=career+paths+electrician+express+publishing+pdf PDF link annotation
    • https://fotoprint.lv/downloads/file/kosaruzusopobajowif.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/ff62d1393c7558f99a2c60d851c25179/wederotabafo.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b03cee9d0---wilafifafalokeba.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e02a8c5a4b---2020136601.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/67620681999.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/31880320999.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/5df71ccfbc76e33017459b127867a602/49229075867.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875bc29a6c9---zomewuwug.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/kemerurevi.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/zudunudiseva.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/5e90ed4c5eb1afd76f19e5ea8ec7125e/fugisabimatevuf.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123295306bfa---nubatovalotivufafada.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c27afd11fa2---13868000780.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d4b68d2b2---lisugilubevazisod.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/94737891360.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/faretutavumomavezaza.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/82745123204.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/remaz.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0696951001620293749.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085ec754bd14---85295926914.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/ginixutivu.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ead005ca8---45974349205.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5iuaocof708ju4q2h2p2t04u8n/987006221.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/15971476508.pdfIn PDF document text
    • 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_off0000e9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F3 11152 bytes
SHA-256: 5dbc9ddd1bf2a9793bbfd74c9ff202d6ee2c7f3fbd3becf903f005a805ba28cd
font_01_sfnt_off0001038e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1