Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6f5719c50d931f…

MALICIOUS

PDF

89.2 KB Created: 2021-07-05 11:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: abeb35ec3b60b7b12b685611a40cdbb5 SHA-1: 5cdeaf1146aa9c30b2965d5e45a8016b7d1133ef SHA-256: ea6f5719c50d931ff724bf4f0e2259b1ad258b0e4ea2b479df0a5f609c368873
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content or exploit vulnerabilities. The presence of embedded JavaScript indicates an attempt to execute code, likely to download further payloads or perform other malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=what+is+the+importance+of+having+philosophy+in+life PDF link annotation
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4bb86e5b1---dixerixozezatatipanimuziz.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0083ce0553---46549469415.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/tr47a0ls1safne1tclb9see5cb/tazugaserudozexir.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/53987223196.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/30500130867.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6eb277501---43307710036.pdfIn PDF document text
    • http://whsclass1968.com/clients/f/f8/f849445bb2fb8f42e7c863050dc1ba38/File/duruxikugozepudo.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/38259596460.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ghcqnvp5dqtbj7kfajh7rp2np2/lelebixok.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/fupukivuwadawanekew.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa829f0cf3a---beraxuximexozisafadis.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/xokokifam.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16098a8f0bdf51---38596137301.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/75624324712.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/vidomadepitofo.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7feac7d13---28737512201.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/jilavujejen.pdfIn PDF document text
    • http://momsystem.ru/public/file/55374875446.pdfIn PDF document text
    • http://93564497.com/userfiles/57268077002.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/bef868ffeb4213761e01e590a0c4b366/41927730322.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/973cd8ea8f0c559a7d63516ed80776ce/30576468029.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/46029466409.pdfIn PDF document text
    • http://soles2walk.cz/data/file/78768884712.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/81072733823.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a98c9696044---tijirebidevune.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_off0000f94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94F 17008 bytes
SHA-256: c2efba9b0bf2b38dbb53ddd6330d770d89823f99c6842fd6f22974ef7be559a5
font_01_sfnt_off00012537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12537 11100 bytes
SHA-256: b02a4c9cd2500ce3a9b74d8c2097efdb76033b42136ef0d375cdcca37c04fcc7
font_02_sfnt_off00013f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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