Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd4f19b41964f6c…

MALICIOUS

PDF

64.0 KB Created: 2021-09-12 14:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4fe6d540e75acdb4d7a030c11b798022 SHA-1: a07d1156a30aaa41e2602878f753f4bbf3a38e8b SHA-256: 7bd4f19b41964f6cd5f767a32797c27098e1918d52b0da7781ff3708219211c4
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6339

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 http://www.cerel.eu/images/wyswig_images/file/jemudaxe.pdf In PDF document text
    • https://nutrishop.in/ci/userfiles/files/zuzexoranu.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/942936489.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/lavifeveriwezemukevug.pdfIn PDF document text
    • http://jainfarms.com/uploads/73307156164.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/wimalinetugoperipilufimu.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/gigijugi.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109021722452659.pdfIn PDF document text
    • https://alhasooncorp.com/Files/files/32388357378.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ami6qq1sc74op8qgkvggsdr973/7553917416.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/gekifitufefosasoginufovi.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/bikosokipifikugukaleviwu.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/49924833138.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/43550826284.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/goderifa.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380c69319b8---82211160127.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/5766340708.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/76670664156.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/gudodobesonetovibilixuz.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/zovefewemimo.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/49174089064.pdfIn PDF document text
    • http://slovoveri.org/userfiles/fojopumavixabegokidibuzub.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/72758062644.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/kosomisisili.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=android+windows+program%C4%B1+%C3%A7al%C4%B1%C5%9Ft%C4%B1rmaPDF 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_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 11156 bytes
SHA-256: 2297193aa4319dc482f9e1f550be7964bc7d829931904d96bc9da7624d1ccc4b

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