Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce34888273e5215b…

MALICIOUS

PDF

87.3 KB Created: 2021-09-03 19:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e61a4ec8694b15d961f9c780803612f5 SHA-1: 69b28da96ff22cb08dc8cb97f2b3b486a991b2a2 SHA-256: ce34888273e5215b7a5d97885bb113eebca441f249dd76392f09e25d6a61bd3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=electrical+energy+management+system+pdf PDF link annotation
    • https://acrgroup.nl/userfiles/file/78542390476.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/dabcf9840c695ee78f39cff3c4947720/19139041797.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/7f9f05bfb9bf2cdf5c93a3eb15067070/kitifuk.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/29258827664.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/mujewulikeferara.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/1af3e7b60ef4771bf069a67a38c191af/lidebef.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16262230001082123187.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161070ed12a079---limadojemulijitobavolibit.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/65485cd2a4d41c21f7ea6e117e050299/wawapumevafegejizuvil.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/67658883125.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/37499172338.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612d12681452c---48665561675.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/86146264383.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/2515379063.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160add593916c4---fasovafolivib.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/ac294062b310a641f1be08394a07d324/65715297793.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/12868929571.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/kesagewewajoguwedotal.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2dognpf6aururh6pb3dmq7kkvm/pezafuzu.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/89795629807.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f391b2bbae1---kakufubowamulo.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/ou4u1scsmkn8p4skmf0v9dhqkb/xaxukagenuzemivupobuvu.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6d0431caa---sitonadixuwetidi.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b402f29f54f---dunijuvijiwuwal.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/guzuvulafikeduzazonasu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 10940 bytes
SHA-256: 6880fcaee6f71bf0bc96e07b5a8b50b7de441c3260d0dcb75303a090d9e7ac89
font_02_sfnt_off0001210b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210B 17860 bytes
SHA-256: 2342377daa409ec44c0587f40abb1041a0ab42598e4472a8fb8287c34dca60ca