Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26582b5e7143427…

MALICIOUS

PDF

79.0 KB Created: 2021-09-06 08:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4eb9ffedc5c3abc986bc0b8944a8303c SHA-1: 2ad3d68574509560d59b0933c34d709d4bb415a4 SHA-256: e26582b5e71434278d0b1649d55112f0b0d91f54954489dd3208f26532b80410
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple URLs pointing to compromised WordPress sites, indicating a phishing or malicious content distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7431

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 http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609465233ee59---merukutinusekobaw.pdf In PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160906f1d7cbf3---47593202624.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/161141f0f1adc8---76710157187.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/85114418593.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/69769631748.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/81fbaec4dc212bb6e07366af03c3aab5/jenufojet.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608550325aca9---11064092292.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/96102021706.pdfIn PDF document text
    • https://yuss.it/file/sazeripuluvobaguvebojeri.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee14e2a42---45876233840.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/pifilovowivonosobuv.pdfIn PDF document text
    • http://atomleasing.ru/media/File/52251901797.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/c76000e7811f0d1b5a775b3c4ecbea98/13452041893.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16109e8212538a---13511048524.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/23450733798.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/f028a375d30eea6616e3228e0c616a1b/80516082540.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/dananunik.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/0c55b3d6b6be6647458c2a9c1dc4e386/2291353124.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/j14nucgoogaj72tespg85k5b58/kabobajavijabezeraxejimi.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/terogowixodogokugeb.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bmf2jhkqaf8qk2jg3dein2qgb6/suzetavibasidulo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609665e11ffdc---xizinigifewutewagukubave.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/worekusizezusabafamaxovat.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210620070709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=camera+shots+and+angles+with+examples+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 17428 bytes
SHA-256: 518d8ee6809bdf6b9d3831e58075262ebd4214c4b9e635bfa4e1f177879b19ee
font_01_sfnt_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1