Malicious PDF — malware analysis report

Static analysis result for SHA-256 9285e41580c76e71…

MALICIOUS

PDF

71.6 KB Created: 2021-06-28 10:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7514e87164e6d422816fc04050eec40d SHA-1: b3cf6bfd6f3b824f249df62d9298b56f6ba98feb SHA-256: 9285e41580c76e71cf7f3e15e6dcab62eac9e2daa982a9c8faf09df790c6cfc4
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting. The embedded URLs are designed to lead users to these malicious destinations, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993e83c81d3---babinotefubejas.pdf
    • https://fokusmedia.com/images/uploads/27346758932.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160720c02e83ac---3461374350.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6845149ce79a701229ff08e3c0180ab9/nefixefivunetoba.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/2di8q52foifm42oea212lnf222/gidevun.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/fec7c3abb2b09785bb11b1ac7b0f2be2/lemonu.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160759e965e320---69785634947.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e12057d72---jidex.pdf
    • http://accessiblevehicleservices.com/userfiles/file/jagepuwe.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3598aad5a7c136e55efd2b513040251d/kepafexuxitaxobobudap.pdf
    • http://www.aadhar-interior.com/userfiles/file/99721297367.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16097ff99b83ec---zemabojedakexunow.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/9f40b292b99b627639a61f3cdecb313c/vebezalunudedike.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/00b01cb87c3eb29a680a1dbd56ca5024/19717552961.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/b720df7e2aaf9853ae0fddaf9f81b740/90286562426.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a5617c258b0---venexozutupilobaxet.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16088ca82a6808---20065810365.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33b22f32cb---gopofoxa.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/qnpsqi4265ash61c2ihj9bhk6b/xadate.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609867ce662ce---18178731513.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/625b0d7fa07e6dad1df2137ffc14ade9/lutowukodevojexafirigigoz.pdf
    • https://espaciocultivarte.com/ckfinder/userfiles/files/jemudimifodufibenevapox.pdf
    • https://matskaren.se/anvandarbilder/203/files/tapezopenapelisuxuti.pdf
    • https://sasalidayanisma.org/uploads/file/53887320845.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=sciography+in+architecture
    • 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_off0000b8a8.bin
15f582c0f7575b273d60629e187b51cb38529de94e3fb406abd6481012f4debc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A8 10728 bytes
font_01_sfnt_off0000d159.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD159 16792 bytes
font_02_sfnt_off0000e96b.bin
c52352840821818f564652f40b0e42682ff603bc6faadcd985142f6c9e1e9d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 15764 bytes

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