Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c0e4f7107f69a8…

MALICIOUS

PDF

87.6 KB Created: 2021-06-28 05:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e9ad0e9660de39ebddebfae81a003df SHA-1: 6ff79f33ec5c1dab27189b9f38eb3c8283126435 SHA-256: e0c0e4f7107f69a8e8d544f2ec3dde4c3923c870c0855968c612e07153ebd406
166 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's content is designed to trick the user into installing a browser extension or update. While no scripts were explicitly extracted, the presence of numerous links to compromised WordPress upload storage and other unknown URLs indicates a likely attempt to download and execute a secondary payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf29745ad46---25540550935.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706cf7a2332---fisizebivejojixurojuv.pdf
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/kekumipepif.pdf
    • http://enerjipiyasalarizirvesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81f1fbfc60---44571475717.pdf
    • http://kirilmazbardak.com/userfiles/file/latawitubemuverowigidogem.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160894ca813ad0---29395150543.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160948b58e5fa0---wulobikogol.pdf
    • http://alituncer.com/userfiles/file/lekebedanodijeluvoxifokul.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc970bcc5---71934411497.pdf
    • http://originalcheck.it/public/img_admin/file///56714737418.pdf
    • http://ekotronic.eu/files/file/fusox.pdf
    • https://emauto.lv/index/images/up/file/pogolapixoliporufedisijaz.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b960cea954---39747511548.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607900495be32---mizosijovasugukerilak.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160973559b9689---novogin.pdf
    • https://universal4shipping.net/userfiles/file/merexojumoribesuzusizop.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ecf5aa187597d1883f39caa90853972f/95511229538.pdf
    • http://skogsformedling.se/bilder_umeny/File/48519066879.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d132ecf0c0---fawitamofi.pdf
    • https://autoteam.in/ckfinder/userfiles/files/bijiwemepovatusika.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+take+a+screenshot+on+tablet+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07f.bin
38f5aed027acbeab808bc8b83680427d4671e157164b0c2fc1769a846af1b83e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 10776 bytes
font_01_sfnt_off00010942.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 16792 bytes
font_02_sfnt_off00012154.bin
f7675c049d113f2036f5aecc9f9cb1c2ecf71fd367a5a985215231b7466cfb82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12154 18196 bytes

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