Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ad1b893b226516…

MALICIOUS

PDF

168.4 KB Created: 2021-06-30 02:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9297db52d0621b4d7e8d06bc29d4b0a8 SHA-1: a0c48537b5e3136a76ac9bb9b8dbb1a25e776c0a SHA-256: 06ad1b893b22651659c1726d09f1fd4787dffdfa5a491f7a280553f8f1ca2766
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9689

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 https://synerhu.ru/uplcv?utm_term=spike+tom+and+jerry+breed
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/a20af89bb79cd81b27cf40b8e8831b9c/tatukavuferowiza.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a957130088---fezunamisasa.pdf
    • http://kstarsmall.net/userfiles/file///33281473937.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/15d6f32914a8e62095af176a485fad37/tejabovopibijinazomarodox.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/2hojpo27rel3a4sruhatcoau7n/24332355254.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1232ee2672ca065875e56b5820260d71/kipipunibokaragokoval.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/6ccf39a3aab945da39cf08a9dd0d6a21/videgomu.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783268ae436---lakefizurexo.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edc5b3d6f9---91020817871.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/vg9jt9tklume33dtlq0aq3jg72/74578642881.pdf
    • https://hyosungulf.com/uploads/file/viwakedezixudekemuv.pdf
    • http://vimar.ua/userfiles/files/gogufakaxumanoxad.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/d311e8a3d5f1427ed3bf5008c11c12c5/51729044482.pdf
    • http://bdn10.cz/files/file/59254437476.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/5jmkn2vl14l5j935b8ns9gjjo1/zidixuk.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/24636c414b914b4c8f4ecdf122a4086f/sasegebafako.pdf
    • https://houstoncoinshow.org/FCKeditor/file/60196162397.pdf
    • https://lonnebacka.se/anvandarbilder/126/files/33912871697.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/gohlvm02ed5f6fdu87c1lo0d3t/54104925657.pdf
    • http://pokewaveanaheim.com/uploads/files/58787268055.pdf
    • http://buergerforum-tirol.at/file/88101951237.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c27e4ec78---18600227329.pdf
    • http://koreaseals.com/ckfinder/userfiles/files/zirivonakafexupama.pdf
    • http://pantipplaza.com/userfiles/file/saronibe.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2f2d83e8083d544420b860854bc75bc2/56070896505.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806d180af45---ragidunaxazan.pdf
    • 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_off0002338b.bin
b19f66d5b7828d65eb2a564ec633d91d2b7a62c186995130d4faa11f73cc0e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2338B 18028 bytes
font_01_sfnt_off00026285.bin
542b2aca53a50074af91dedf7a4a7d1ef476cd1d150fbd7c98cc2d6b1fb8c2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26285 10888 bytes
font_02_sfnt_off00027b77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27B77 16792 bytes

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