Malicious PDF — malware analysis report

Static analysis result for SHA-256 c417c5cbdc9c6458…

MALICIOUS

PDF

95.6 KB Created: 2021-07-13 20:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bbddad35ed3ad8217c5ff9e4202e9c4b SHA-1: ee3dedc6e45892dbcfd2d311c8db21f0360bc0a9 SHA-256: c417c5cbdc9c64587d7d7ac647962f33c4799636d4ed2dc1baf9cfcda403e524
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to phishing or malware download sites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=blessing+of+the+animals+liturgy PDF link annotation
    • http://csptech.net/admin/userfiles/file/befuxiwirofanojologure.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/9cc5d3ee2f61dd51497692f464ba66a6/35542519413.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/pasukizixilafomibo.pdfIn PDF document text
    • http://waberry1969.com/clients/877040/File/96654291776.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a079a19169---95423191053.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7de1772bf---dokazotawijiridumu.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb00d98a91---28515199003.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/fexijon.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/d1c588b80a0b7e890febecb6ebf2cdb3/vekatepelulodebubipilora.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/327f124a76c608e5d7785a8637c63304/96142127167.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/zosoxosotonozivuw.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/vukazidenakatuta.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/84507542360.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607816329eab4---69805546058.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/23898743ab46c65c71b36dad7d699fdf/pijanijumuzogegediget.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cfb3a46a7---dabeporoluzibasuvevujamu.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/43692767101.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2042c1604---sivipusiwugipolizipus.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c18d0bc56---46416025427.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/19141424611.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/81377279507.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/2092316481.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/293d80dbd603f9bd9d26221fd8ebec5f/bumefiju.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/prp23eja132u6aor5p7u2fd426/27182503662.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001131e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131E 17496 bytes
SHA-256: 8fee865e31474bbc54463afbda87bd89cf8ac1554d638e7100261108d407fec9
font_01_sfnt_off00014028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14028 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001583f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1583F 10928 bytes
SHA-256: 030fa5b565187ce2d1a9d85b84c0afd4516e3825782adff5e983cd6fcae00e24

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