Malicious PDF — malware analysis report

Static analysis result for SHA-256 2699b45ce3b63f2b…

MALICIOUS

PDF

87.7 KB Created: 2021-06-30 02:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd0e874e6431947f18f85ae7011dffc8 SHA-1: 49823c055564988c260316784138d16f9517a94f SHA-256: 2699b45ce3b63f2b8fce641fe45b4011c3c361575531164a66b06f4654c1b656
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms suggests the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://medvor.ru/uplcv?utm_term=story+of+mary+magdalene
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/qr9vlq5nvitj9thqk395d63ar6/foviluguzasodo.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a15a28965---89571114876.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079162f13cc1---nofeb.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eefc31a006---punojajogakadem.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/cmjgab3sfak2aki4kd5trtee0r/66463141321.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608173d520353---babuwanil.pdf
    • https://bititechnika.com/uploads/file/77716301079.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc1200bea---jigowu.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72652d0cc2---44768321892.pdf
    • https://nabsangram.com/userfiles/file/90239946149.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ac3fab303---87407594829.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/9c6f0a07d7af884f68ac6d18aade6f7f/risojudovarug.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/b2d2ec13e20d4e00c296dab107b77744/gezinajigiwu.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/iuuef4ndeft3i0p8h5t9849a6l/joramovapipuxaxalesa.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607938a8b45ad---79346680299.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084a60882cbb---89846471181.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/a4ndladd299kh2ipkqqaeal925/bevuzimopibeb.pdf
    • https://luminex.pl/upload/file/67855470182.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606da2692e5f1---71937124023.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa62ddc808f---ruzepepi.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/9a3c74781db1c57d5beba103fc815de9/96864892513.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f35a3e85c---refizulabi.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a935f9676ae---60731007666.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec0399c8b1---48334418695.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/re50plakgb8943ibik7v0ssuo5/3056959876.pdf
    • http://smflow.in/admin/uploads/file/xurabido.pdf
    • 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_off0000f4d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 16792 bytes
font_01_sfnt_off00010ceb.bin
a45c91e49b8ca7f3340d9b1c31d3e683e6cd1b4efa2f92b8a950f17f7cc6cf17
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEB 16976 bytes
font_02_sfnt_off00013906.bin
4c67066d9e48fb457a99ca4e20ec8c0ae03e0014927ffca482339fd75af81611
pdf-font-stream PDF embedded font (sfnt) at offset 0x13906 10624 bytes