Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c53ed0b9f48fda…

MALICIOUS

PDF

87.5 KB Created: 2021-07-07 02:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c52b9b52fe4e5641b3f464b6073271fb SHA-1: b613c43de034ddd24e65eaa363bfbdcd5f0c4622 SHA-256: 19c53ed0b9f48fda6c67061e0de9c1c029b35c0d574222c4454c7027c41278c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The primary lure appears to be a fake recovery tool for unsaved PowerPoint presentations, directing users to malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://irlanc.ru/uplcv?utm_term=recover+powerpoint+unsaved PDF link annotation
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920a006668d---vekepevolumalidol.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/c6ceb35ce9dd52ca7e47f567dfd829da/14203752959.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/c0cc1833fd07166147680ebce6959c27/1655706157.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3628c347e---libobexil.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90c7e5c584---susodafefuxi.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f7e865d163879b0a674ebcb3b11a8d1a/lumelitu.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/80754377691.pdfIn PDF document text
    • https://icbacademy.com/upload/files/91626216044.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96be476d41---motipikolaboludajijar.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/dfd15c6dc0cf6d03adccbc05d0cfe879/34723150110.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/o883d7grsmf2jovclpq4qn2jk7/42387853194.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/is0l77rt3rts9ho0ioeuh8eehu/zaxilunub.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/2b112f57401c016128b54e2577e2280a/28257936863.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d2204c2dd---95198554158.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a50720b353076d019b4534debf71b9b6/tonugufuzaxu.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160799b9c3f36f---fovepixejoxutimonifali.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/49h6psjbtteu0vv43ilvb845u6/vikogizomo.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bbf2e6f01---fonokubifewuj.pdfIn PDF document text
    • http://candientushinko.com/images/file/67492574563.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/jepesi.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/vepomogugifexetoname.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/gatibura.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb2eb932a9---83817722730.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/xukikolujupebavereluneze.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/lixapasadovitunawigunaz.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1c9f6044b---bazixuravopenili.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF359 17100 bytes
SHA-256: cace67cf590d6d09607fafe142844a6d96d3f9991493be66128784358014fe9a
font_01_sfnt_off00011f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A1 10756 bytes
SHA-256: 01819171696b9fa9db93daefce81ba5fd423a1aeb2aba93cf1d2016bf72a4c3a

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