Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf517e3ec96f496…

MALICIOUS

PDF

79.1 KB Created: 2021-09-06 09:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a5f5d019185c34b5ada03c424a4b3ba2 SHA-1: 835825508fb411f200baf78517ecaf40aea14a27 SHA-256: ccf517e3ec96f49650914f4dea8a5d091eb1a5db24c170058c9836776d53d716
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=rendre+un+pdf+non+modifiable+mac PDF link annotation
    • http://anhuizhkj.com/upload_fck/file/2021-5-19/20210519064545364129.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/felido.pdfIn PDF document text
    • http://ridendo.cz/files/file/27383239680.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/b709be5a59730ffb81e31ad46504f7fa/78048533397.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/51347287903.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/sojexadu.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/bavuxagiwifezuvunaf.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e155081ae---jobuvidixuxusa.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763d04f042a---19579535854.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/25798777340.pdfIn PDF document text
    • https://ewt.cz/res/file/3764351283.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/70ef88dd4cf8157727bc0d86564e2812/supijaxujaxixiwe.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/fowojab.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/kumumudosilegagajiv.pdfIn PDF document text
    • http://halanmilk.com/upload/files/79136054595.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160da0d401b94f---pekezakuk.pdfIn PDF document text
    • http://riversedgefm.com/files/file/pumoxosopusoto.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/97454884.pdfIn PDF document text
    • https://elcoengineeringco.com/userfiles/file/judorenilubozoxemifi.pdfIn PDF document text
    • http://pratiklinik.com/img/userfiles/files/67701372186.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/27uf3ciggelfj1a7md2r14hfv2/manelekinixisajabe.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021080116482949.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/vekomigopewojamagubun.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_off0000d022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD022 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE839 10800 bytes
SHA-256: 19586a7f937faae25253bc220c65230dc618b17cd8e852abd259316dcb3c9e52
font_02_sfnt_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 18304 bytes
SHA-256: 0f39b57278abfaa9f2aa00775691125fa8b9cb1514545dc565c841f404793d9a

Open this report in the interactive analyzer, or submit your own file for analysis.