Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ec4c6580e0f38e…

MALICIOUS

PDF

87.2 KB Created: 2021-06-29 06:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59ecac8449e7a25d648a73b02ae51eee SHA-1: f45fdbaab028690f8e2f307ddec776cdd069e245 SHA-256: 96ec4c6580e0f38e2b3485d05bbca6a491503d20e2e7777e31effc7947ace62d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. The embedded URLs are the primary indicators of compromise, pointing to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://chcial.ru/uplcv?utm_term=hypixel+zombies+texture+pack
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/23d9a79e217e28235d98f2a52936a03f/14121477864.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f3062300ae4d783016b23894893d3aeb/nevivosaperude.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae00484eea3---13863777384.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/6a41ef8a8199b2c7dee3eb525d7d2005/vamaf.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/05fc4d3a1a1b60c78f9ddde29b383782/96510939114.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081319ebc40c---sigabumaxotabuxikabolav.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779cffa0872---48317653436.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/6cabbb396be4543a3c36825183cd7253/ruzawunufurojevifovesaxiz.pdf
    • http://decamiones.com/userfiles/file/duninitolababami.pdf
    • http://kag.fr/userfiles/file/93321570360.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/68780885186.pdf
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/sukaxog.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af5a2d5d31f---67864682885.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f0baada6dd4446d7050b372588baa9dc/13121648092.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/daf9c02b7d2758ff25220967b94da365/64295737691.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160722536e1f55---jolimiwuxukufonumiru.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ihmdtgnmsh7s7cq2ifnrm2pk23/86240994143.pdf
    • https://jmcoverseaspvtltd.com/uploads/files/57580626013.pdf
    • http://timebymtm.com/upload/files/xajawurorixekefa.pdf
    • http://abwlanham.com/uploads/files/vofelikotawajat.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b326c6e6990---91943910162.pdf
    • http://tcihk.com/userfiles/gitebufovutesedodimuk.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b651f33845c---novegivogabapel.pdf
    • http://vencedor.coop/images/admin/file/1023239239.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_off0000ed12.bin
da8ba57c9fe017a16a6b79ca0f6fd4f238db1bc897de0a56d24c4c275abd9945		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 19016 bytes
font_01_sfnt_off00011dda.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDA 16792 bytes
font_02_sfnt_off000135f1.bin
508347e88d5921d4a30d2008e3f7e3a5d3db55898226c2a666d4cdc4303b2008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135F1 11032 bytes

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