Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3ed00ba28677c5…

MALICIOUS

PDF

72.0 KB Created: 2021-09-01 18:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 210bf757b5098115bb12836e953d8f49 SHA-1: 00cc223a9e8a7db661f1d5f9d8052bba0c39f527 SHA-256: dd3ed00ba28677c5ce9014c248a5b7ce8e50e9a06adc6df8eae46f0590081b36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=over+insurance+definition PDF link annotation
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bcad71e0f---51577266588.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16122e4293ff46---34854140068.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/85909823714.pdfIn PDF document text
    • http://ray-king67reunion.com/clients/41562/File/78424702500.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/87033183310.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/karomomaxidojijaka.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/096a2cd998b77b17c34e2336f1bbe69f/29753127708.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/rodew.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/97322190061.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/lupozudojibinepa.pdfIn PDF document text
    • https://ip-pharma.net/data/files/76951291132.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/jugabuduruwisotutof.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/vamosalupuziwujabudojas.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/34127027280.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c47978da151---sedexojodefeweza.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/sumizudovegupo.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/taxovizudigiwarotorez.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ae483565e5d---mexoximenovuxufarimavojo.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210610110523.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/9d99860d4881d158f7724dfb6db09660/73854366969.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098754057731---76183165095.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/41839546226.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608374cf07b4c---telada.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/witunu.pdfIn PDF document text
    • http://fpole.ru/sadm_files/60107934318.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/temazuw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000bc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45E 10616 bytes
SHA-256: c54d95fbafa169c7387fc0f535b76ff2b70246bfb9b8afa43744b270f7084b63
font_02_sfnt_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 14864 bytes
SHA-256: 6baca09067e43c4d0f74345c6a3dc2008c3f87294a57d2bcd260e5e98f706390