Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c04ee8298685fca…

MALICIOUS

PDF

89.8 KB Created: 2021-06-30 03:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd675c267da94e78651f4ada4e7e34f5 SHA-1: 7adf3460c5aadac3cb6adcaac086c9025030cbf3 SHA-256: 1c04ee8298685fcaaad6c3b390477baaaf4d9df5c5bcfaa2c219f9d545eb9497
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it with high confidence. No scripts were extracted, but the structure suggests it's a lure document, likely intended for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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.
  • 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 https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/94c831621fb0057a25a363841ca30da9/zonemebexu.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16098b6f68b373---84552485180.pdf
    • https://numen-wow.com/userfiles/cloud//files/51259785654.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aad83fc3259---ludapafuxukesuzofajamel.pdf
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60670969786.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/1628857088.pdf
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/d0a197d8e08fb17814c8da5ff9fc7731/37244224102.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/k180de7iqnim1ncqft8glaar96/75588730334.pdf
    • http://motorlustor.net/userfiles/file/roximituvofunavovotop.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089cf94d4e71---sevarerifarexaxun.pdf
    • http://pnmanagementsolutions.in/uploads/8449738416.pdf
    • http://dancedynamicsla.com/clients/38740/File/gexodanibuvaduzap.pdf
    • http://tunglamgarden.com/images/fck/file/93138779661.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160befc3fedc86---98606280585.pdf
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/sl3e3s37aumnepni7h93g2tqa2/22217782927.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/0a3ab118e1b9c923b1a38a4a4cbf7ed7/sutifebapesujutovelumozo.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4ad0c1526---wusiboponorolo.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/lveece6l890h2o4l4285eb1596/zelisi.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20d1f53823---42681049160.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a4431d8508f---vebagaxudalun.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091b913c269e---banuxenuw.pdf
    • http://szpital-sulecin.pl/images/fckfiles/file/60745413080.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d893e0f6ef---60945941092.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4184b2ce5---18806687548.pdf
    • http://dobre-jaja.com/Upload/file/16139392146.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=sat+writing+and+language+test
    • 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_off0000fde6.bin
c6b24cd217ee55e69ab84e31d730b1b39ec9b32bf0758273a5a978dd1effe6d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE6 17368 bytes
font_01_sfnt_off00012aaf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAF 16792 bytes
font_02_sfnt_off000142c6.bin
c67587e6e2bcbd7eecdaf524935e22a4bb78f79807b9ecfd3361f981e389ba92
pdf-font-stream PDF embedded font (sfnt) at offset 0x142C6 10564 bytes