Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d015e08b7dccd32…

MALICIOUS

PDF

80.5 KB Created: 2021-06-10 05:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 443ff3bc767fa9a76e121b5a60fbca9e SHA-1: c2112752fb988c70cbe6048e88875e84bbfe2da0 SHA-256: 8d015e08b7dccd32bd8375b12fe3c9f175f74cd90f2e8b0f0d8c67f57250597a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://coretry.ru/uplcv?utm_term=sampha+process+full+album+download PDF link annotation
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/j6pp0lb70ijua524l1gerj7dr2/74050771582.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/720f9006e0b55436134f758e5634e547/69452691567.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/t25m5tagmrl54bvq7shsqnmdvh/jofogowakezuwevuv.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/7a91499bb0ad7dd4a67df8d96057b126/17902063721.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/36736833176.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/fa3fa471311b76dc253edd6f84145386/gefokulaki.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/797ba3e6c332f09c63c3180a8f7df9b3/gegekurezigure.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/59978963355.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dfe14bf5c---senixovigudir.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082986a5059f---73450429196.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/87282cce21bab91ccb215d63b1b07bfc/26381139448.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/zujavu.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa7997fc86---kevuxotusejo.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vopoguditesurafagadalag.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/18f8cdf349ae70b1fe80ae369d1fd1cd/lanofod.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ace7cd3cff0---xolulepasuluvejifewiwi.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5e88d87d0fbc2e83156adc512b2353e9/31853610639.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
    • 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_off0000e061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 5732 bytes
SHA-256: f09c3fc519638b15fa31ada46b15dfb539796b39fd3cfba410f1d350aadbb809
font_01_sfnt_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 12828 bytes
SHA-256: a91f594edd6e747c7b2c2ac9a4f43708997812d268a3eecf5b81a49b1ab013e2
font_02_sfnt_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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