Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ec4f08c8d570b7…

MALICIOUS

PDF

81.5 KB Created: 2021-09-14 01:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c06e419a8caadeda3321f6d019802994 SHA-1: 1c385942296071923bb00a657a0bbd08dfb922ac SHA-256: 96ec4f08c8d570b7f3b0559bdad0c4b4515d651754789d4196ca8ef2f3b6778b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript, although not directly analyzed for specific actions, is often used in malicious PDFs to redirect users or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/vifukofokobiralojive.pdf In PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuwotejipib.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/74292835792.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/82113667196.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/85923438528.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/dewafajekiras.pdfIn PDF document text
    • https://hgb.se/filer/file/zibegawexodi.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/71977409363.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/19429544948.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/345647975.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/tomumizibejodefamedivitir.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/pawetusegurotegagemigo.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1612f55c0179fa---kijibapezevutosekubopifem.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/bonelugotuk.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/nejunuwekupu.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/16822180909.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/30850243951.pdfIn PDF document text
    • https://webkapper.nl/ckfinder/userfiles/files/wofimakunulifotenuza.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/gotopanudepofew.pdfIn PDF document text
    • http://1careglobal.com/upload/files/suwikibapavinexixedu.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/82097739111.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/mununigelogiviv.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399738b1fdf---bigidek.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/belobaxebomelimez.pdfIn PDF document text
    • http://simoncaulkin.com/images/45672572889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+get+rich+felix+dennis+pdfPDF 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_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 10916 bytes
SHA-256: edf90b1c37612f4bc461010c752770f3bc8b428c89ca1f3c58025175040acc26
font_01_sfnt_off0000f484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF484 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C96 17140 bytes
SHA-256: 3fda9c1aebfc48d899a11488a3d7a13af474f3bc9e3335be1a9af207e5a96aae