Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f214f0b3831b84…

MALICIOUS

PDF

94.9 KB Created: 2021-07-02 00:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 99a7f419f31dde15f13f3e3f4e843578 SHA-1: 84792a4842e29d5a58f7a5b83974d5395a984c6b SHA-256: 58f214f0b3831b84de9660e86afe0623c3e43603a7edd737ad47ae1caa9d8c43
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5a5597136---20816596594.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d99c9fabb---84113415756.pdf
    • http://kino-cosmic.ru/sadm_files/96971801853.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/de0b772237ac81f0ad154ac3e4e7cad1/zapobavejaminadofumizi.pdf
    • http://aydinservis.com/ckfinder/userfiles/files/lojulumezexakivikojikalo.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16078e47a76472---pixivomasopegubinopi.pdf
    • http://voxel-avocats.fr/uploads/file/desujerufomotek.pdf
    • http://acmemask.com/upfiles/editor/files/75640275477.pdf
    • https://tvmreza.tv/ckfinder/userfiles/files/38736044003.pdf
    • https://yourownadviser.com/ckfinder/userfiles/files/jawodipakatifaxesefigoka.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/4b9e0f8a59f43411760253fec4654981/39027798330.pdf
    • http://coumert.com/images/file/kowidutixagibujijugajavoz.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/becd8b61a972674cb275ca4157d9a1f0/kedefakat.pdf
    • http://katyababash.com/images/uploads/file/bemuvuwigefol.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/222e8dda97b3868665c4c938a717f8ff/10628546841.pdf
    • http://clinicaveterinariamontecchia.com/userfiles/files/96788615614.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c344aab32---mubopumafominiwezuma.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/asf1j6s7litqfbfq1u07o6f3q4/42253289628.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/d7a6f4b577f416976c6aada3e338f8a7/dukijasutij.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/omrn0ln872c5n2625gh419qun2/geropenexa.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/83122109899604a16a8f40b00a7425f0/35550448297.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d77cf91fcb8---vewobujetofiduseragarujiz.pdf
    • http://gloucesterclassof81.com/clients/23558/File/91547155304.pdf
    • http://calhi1977.com/clients/879053/File/nofumabizunukapozix.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/a7486cd1e49365ad507c70088dad8379/41470114466.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609476413f5e4---22668727995.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081de35ec1bc---tufizovopuz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=upholstery+recovering+near+me
    • 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_off00010f3d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3D 16792 bytes
font_01_sfnt_off0001274f.bin
29b32b14d52b633f518aaf71f0cadb98f6b4bc119b55162c7d2186f5f5799397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1274F 16904 bytes
font_02_sfnt_off00015301.bin
6dd65f91cdb48947db7828fd29fb3dd37d7e626fb4fe4070d23d363892c27a11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15301 11008 bytes

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