Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e12b4a9cfb85cc7…

MALICIOUS

PDF

76.3 KB Created: 2021-09-02 02:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea020e2ace5d70053dc578c7f6d902ac SHA-1: fd966376e8a583c4783904dfcd054f8825a6dc99 SHA-256: 4e12b4a9cfb85cc7c107c68d74176c68de92c6f79c1b80057f09824c0496ecb2
154 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of numerous unknown URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6399

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 http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b52a3c7acd---8444684919.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6695895f8---pabezilolaxasawumedikej.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0b799fc7e5d4e4708d3231ca91414349/tewulinakilizir.pdf
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/makozo.pdf
    • http://bafiti.com/sklep/userfiles/file/92927695748.pdf
    • http://sanarina.de/ckfinder/userfiles/files/zonekozofazukotekanazof.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855643effe7---dapuliwe.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/4hk9iq4b2l7et7i2bm33ne7hnj/jizegerilotavofol.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca91660d2---lowizejipezikuzikeburajuf.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a13a9e48cc84f203bc39782898b32ebc/sijomokutexemosadafurupu.pdf
    • http://elm3rad.com/file/vomevomurofagoj.pdf
    • http://files.ibiza-ferien.de/file/sagibe.pdf
    • https://behagi.eus/files/galeria/files/6076034354.pdf
    • http://cn-junsheng.com/upload/file///202162083325204.pdf
    • https://nguoixunghekiev.vn/userfiles/file/82573069697.pdf
    • https://chmelo.hu/sites/default/files/file/19081890878.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774d069bb97---51248690938.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611e1ecf096f9---34507649629.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160ce15c27f502---betiforogiza.pdf
    • https://canevastoilestjean.com/upload/editor/file/lirifavanebekexamere.pdf
    • http://ciaooo.ru/uploades/userfiles/file/dumoxadovapezokiduli.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccf375d936---zaliduwipirid.pdf
    • http://ingfrimale.com/userfiles/files/dibirumegowixububa.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac49a50452---10354721193.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9f5c008e7---2300952559.pdf
    • http://etasystem.net/userfiles/files/taposowixodelo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=modular+and+prefabricated+construction
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec4c.bin
bc2b5c5ec5002a9eb75cfc317f0423bf69858c34fcbbc914155d6a991eb09b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 10848 bytes
font_01_sfnt_off0001052f.bin
bd21eb4b884dbe6cea2cc111a26d9f3a820fd3895c9bb176a5e43943ee53cf0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 18592 bytes

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