Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e63db295c3394ae…

MALICIOUS

PDF

61.4 KB Created: 2021-10-12 09:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8fa4a90d90030f57ec9b1b53634cc732 SHA-1: 5e3e97dfa12073ede9c7f4237eb0e3293ae81a33 SHA-256: 8e63db295c3394ae94ee885098c2a5815578dde85b4837b9aa64fa6713f26b68
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also functions as a link farm, directing users to numerous external URLs, many of which are unknown or suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8187

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://rwd.webseo.tw/upload/files/58129190359.pdf In PDF document text
    • https://vpmemorial.net/images/file/badam.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/luwovivijif.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/28451255338.pdfIn PDF document text
    • http://vrzion.com/data/userfiles/files/4071900519.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/samotedixalakupub.pdfIn PDF document text
    • http://ccsl.asia/files/51261542784.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/17299604494.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/0dd8f9769ee36000ed697919cd0f6eb8/jumapavexufaralubabok.pdfIn PDF document text
    • http://implantologie-deva.ro/app/webroot/files/userfiles/files/puxatofilopifiburoned.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/76399054061.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210929_E1C001F34D3624BF.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/18567932180.pdfIn PDF document text
    • http://proxima-online.it/public/file/biwebimaberojakudu.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/vuxigivomebugironosejimog.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/dezorowugumako.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/11402649814.pdfIn PDF document text
    • https://istanajp.com/contents/files/zozunenasinig.pdfIn PDF document text
    • https://subded.org/userfiles/file/59590092337.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/xolulukoresin.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/96529206111.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/terusudip.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/maruvirorepitosifimapu.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/99503200727.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/13167732218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/896FEnmJZlk/uplcv?utm_term=past+perfect+tense+of+showPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC226 17840 bytes
SHA-256: 4995db821b109a54cbc132dd69515a7affed0fcc6dbb52d82ff7f53e5b004ea4

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