Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae92bde664511c4…

MALICIOUS

PDF

86.5 KB Created: 2021-06-30 13:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0e36fd71e2534244b454299175047668 SHA-1: 8eb2249df9d920a5fcc53a028ea4941bd0297f03 SHA-256: 2ae92bde664511c48b0f687457604da4547ee67b5acdcd76fe6d53778aa342fd
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to numerous compromised websites, many of which are hosted on disposable domains. This structure is characteristic of phishing or malware distribution campaigns, aiming to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa82bdc8228---71538057695.pdf In PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215211626105584.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606efda0d152f---80684332769.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/704d8f57bafe6f341bf0d0b8d464fd8f/51646034142.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/f784b2aece07877b225cb9d7bb755bae/33361368784.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f233193131---lilobewikonesikadivibogen.pdfIn PDF document text
    • http://beateromer.com/bilder/file/46096027545.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/3e4771278111e18a36e11125f0be082d/wadomemeburebubo.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/95819202929.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/vuzolojugirefuzu.pdfIn PDF document text
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/videpatovalor.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cf6002e69---guxevifurod.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160894812209fb---55050489708.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160904240b44af---zetamixa.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/d9d6ee564b4ce24ef97cb0ef40c84c3f/monigefewilifubo.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160754ff8c5793---sidujipijaketorexagotil.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/fccbed41dadedf22dc4668c6ff1e57e8/doditedifogakapimixokev.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/v81dkgmttcmljm6nea19pqoga2/52936658523.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/duvimazojiwef.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/50090149788.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/totoxetaso.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/76896450464.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afac5427099---kekuvodiwatevipol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=georges+cuvier+theoryPDF link annotation
    • 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_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 10516 bytes
SHA-256: 039cb8debb81ac734b8a6c1e810af2b28ae2856d04c71bddb790cce4a608d38f
font_01_sfnt_off000109b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B9 16812 bytes
SHA-256: 2911892e3214d6f192a6f931cf00997eb8a29143d5ca6ed1f3f2abde8d32ec60
font_02_sfnt_off00013502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13502 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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