Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c63def0d0cd810…

MALICIOUS

PDF

94.4 KB Created: 2021-08-17 01:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 777f2a41861494fb63b74e51182e77d2 SHA-1: be252ac5eed457121b44628187e83c74d867c3e6 SHA-256: 47c63def0d0cd810761c0cea373b4930ae7b1897634e4bd4fb4583a824aef417
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links on disposable hosting and the use of 'utm_term' parameters suggest a link farm designed to attract traffic and potentially trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9229

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
  • 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.
  • 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://philabc.ru/uplcv?utm_term=koikatsu+party+steam+workshop PDF link annotation
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3eb8eea667---78857196051.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/vukore.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/21d7f0c9012fd567e8d034697861d02b/66174974422.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/jokomemekuz.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a530dc2cabb---dagobidegekiletaroxisut.pdfIn PDF document text
    • https://stvorki.ru/files/file/38312339952.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/8e442213700124f0b9d1a0dae1afc2ea/xigumi.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ed53d3555---morigejubobojekuze.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/68939776777.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/tojidotemuluzu.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/dadidivitubaneses.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/82860047831.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/4a8dc775fab803372fbe5867e77e4df9/wadavivimadigeferokol.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/subisun.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/jitiporitafawupisamusofeb.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/9j5slf1d8v4ihvrobvf88pam0l/wubikuvupowab.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/f9b6f3c0e61f9944d40feaa7db455ee9/vefozolanasaxe.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/novigadurilimapob.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/2ipefonh0rdvnvk9kk9ihnv0u1/tavokoteminubibub.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161178e589a436---98988317926.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/1869095403.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3cdfcbb69---41509663339.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 10748 bytes
SHA-256: a557d78130bc926e3f1f670310cd76320af67d2974c592ed9243c1aa80a1ef3d
font_01_sfnt_off00010ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 18292 bytes
SHA-256: fbc66f93dcafe56b41c367667b9ed3c094fb22c46cd1f92347cc3546bb5df44b
font_02_sfnt_off00013f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15785 11064 bytes
SHA-256: 7856bf123af35099c0f4eed0666b2af256bb84220a0eaa69110b0b7721252b08