Malicious PDF — malware analysis report

Static analysis result for SHA-256 d402206c842d7ed0…

MALICIOUS

PDF

83.3 KB Created: 2021-09-14 00:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cf97ebe5fc8c54c76811105504f9f72c SHA-1: 784390e982ee3c223104c58f41a9bc3828fb7f5a SHA-256: d402206c842d7ed086e28d78bb6f1185e1c1285b0a7a5d3d92f068c124914086
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many pointing to disposable domains, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://photou.cc/ckfinder/userfiles/files/putanulepa.pdf In PDF document text
    • http://vikingpaint.com/user_file/file/lizogogifegasevinigine.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/mudoveruwilunukab.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/zomobokaxekipu.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/14583291335.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/safimusivarajizuru.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/gorozowozozegu.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/vixebonutebuwizajon.pdfIn PDF document text
    • http://delve-cr.com/uploads/95322910525.pdfIn PDF document text
    • https://elemonbg.com/Files/File/vesaku.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/89539521843.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/voripasifivuvagijewalex.pdfIn PDF document text
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/23413481951.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/52927319652.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/79530305982.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbc69f0d5f---92439589116.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/4cj2ula74orq5mdokf7rnq2l5l/11630804953.pdfIn PDF document text
    • https://jetaime-shop.dvsportbg.com/files/vorumojodufokasutitese.pdfIn PDF document text
    • http://sciattella.net/images/file/46167763261.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/puvumebo.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/gitawesegegukubugovesav.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/84094894328.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/61772908861.pdfIn PDF document text
    • http://pk.mo/userfiles/file/wikaferanebekexebovalas.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/64721741978.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=8+ball+pool+free+coinsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26D 17712 bytes
SHA-256: 0ad0b944f025b310f976dd86d733c9a624c9d7d8600cb4e6e4fb3d30f614141d
font_01_sfnt_off00010fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DD 10624 bytes
SHA-256: 575903dcd7bba97f9e595fec9b75c5ecc71aeddc79e9cc5c45c809a4414affaf