Malicious PDF — malware analysis report

Static analysis result for SHA-256 0564d04ee8988a74…

MALICIOUS

PDF

95.1 KB Created: 2021-08-05 00:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 6ce20d356d897d0e7c62ac0daf9ee320 SHA-1: be312e7e92282401f70a0b9ccbd140aebd3af42f SHA-256: 0564d04ee8988a74f0c80df1dface2ab9e2a3ccd858b991bda5e6c8c2f8aff01
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8062

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
  • 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.
  • 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://camile.vn/wp-content/plugins/super-forms/uploads/php/files/bavjo2mpm7pn6477hdva7bgns0/463324050.pdf In PDF document text
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/50680186511.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/cdbcda0007e1d927565bb4a87bfc2d54/50702028103.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/97162891177.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a43ee4e6874---worujudotumupoxoxutoboxow.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/litefefapejawumop.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/33542864374.pdfIn PDF document text
    • https://www.hemingway.bg/app/templates/js/ckfinder/userfiles/files/rivonidapamibikepipid.pdfIn PDF document text
    • https://www.neosynapses.com/wp-content/plugins/super-forms/uploads/php/files/rhs7p0mmp30u9spjmqned9e0i9/julitebojiwum.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779ae455465---kamupejevemuzorexu.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ad720a6ec9956f64d039169ea0c92ced/19684407063.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079970b25180---pewafasopuxudewadofojegi.pdfIn PDF document text
    • https://schmitz.cz/res/file/11198774392.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c43d4d70bbd---kudal.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e3cfccf6b---95775828793.pdfIn PDF document text
    • https://vieclambanhang247.com/upload/files/75487335501.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/xajokofujevewuwepa.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161090f868f096---31274884009.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/34750581961.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607168b522802---sesasenipoku.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/17821801879.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e41a645b4---mogonitokerubazudud.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/wafijefaromiwuledeg.pdfIn PDF document text
    • http://waypl.pl/upload/File/8939354337.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/24778547206.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/69670102751.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=what+is+internet+protocol+used+forPDF link annotation
    • 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_off00011fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD2 17488 bytes
SHA-256: 8f4b6a4eacd238e51324129e494064168c78f1e92fffef8e92b06173c886108c
font_01_sfnt_off00014df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF2 10812 bytes
SHA-256: a016613c3aec406e672d880ae405a6431bb312a21bb9002ca3a0fc493fcc2c68
font_02_sfnt_off000166d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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