Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d7647f4b2d3020…

MALICIOUS

PDF

77.7 KB Created: 2021-06-10 14:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 26ace5ee9d47ac0b8cbf4c60469bff1b SHA-1: 25ab0a4aeb517e5718cc2c67c5f3ce02208983d1 SHA-256: c9d7647f4b2d30207f0a5c0d74600afaaefedf93b0ac1b32269e8df091c99a49
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malware or phish users. The document body, though heavily obfuscated, contains references to 'Gta v rp discord' and 'wkhtmltopdf', potentially indicating a lure related to gaming or a technical pretext. The presence of embedded URLs and the overall structure strongly suggest this PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pixomot.ru/uplcv?utm_term=gta+v+rp+discord PDF link annotation
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3411b6a9b4d405f4d24f1f2ff11f2089/63367112990.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210524072315.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e7990be1---folifuxedenosibatikamoga.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/finijitozitol.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a354e9b81a5---64185357776.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/52425353547.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/9nc2i2cmp1hjkctq12kev8bg2d/9094461280.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/21345688450.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/27536834865.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075beb2ba5f3---37279998310.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/figoj.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071298e06057---25125842457.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/qnkvom50jjj32rd1cbin3890i7/4830321284.pdfIn PDF document text
    • http://liyangah.com/Upload/file/92874320158.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/89ceb1bd7774b3d225d90873cd049682/detizaro.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cd70e3ef5---71571666609.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/70591619484.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 5124 bytes
SHA-256: 479a01ca61c82830de70b584f6535e6e96e16b65708021e328c2cb81e5578ea9
font_01_sfnt_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 12056 bytes
SHA-256: d75168dc7a5d644bcd56ab7b9e529424d7e029717f28b7bd1fab3b9cc9c02ba7

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