Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ceee4fc7474a822…

MALICIOUS

PDF

94.6 KB Created: 2021-09-09 09:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ee64cff8cbb2c8b98277fa12cfc5bf5d SHA-1: 31e0a9eab91b86a6b4a09aafa00414da22ee4480 SHA-256: 4ceee4fc7474a8224353502f0237f1fdc8348f2a54a395b404d52520881c6860
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and numerous external links, many hosted on disposable domains or compromised CMS upload directories, indicating a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/uplcv?utm_term=holy+bible+youversion+apk PDF link annotation
    • http://dlzj.net/upload/files/20210909070227467598.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/xifiseligalubepi.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/161386b0464a56---fufopiva.pdfIn PDF document text
    • http://wohntraumgmbh.at/julolub.pdfIn PDF document text
    • https://dcimx.com/files/73996086487.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/xijuxabenusimefuguzexod.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021090112125680554.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/76518673224.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/giboberekugoga.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/64951969815.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161359ad056741---jesibolubebalotag.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/9853221780.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/99875312126.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133c8969947c---guxavogokazen.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/18579681659.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16134ff45d3f29---4539969189.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/jevegoresinujefa.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/rarepatir.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/varixiweka.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/49282234125.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/revakadesused.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/xomimezokorefoxofidedoboj.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/sixupevudexosijupinaza.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109091257029920.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/7351bdf916e6039c49c71129ede9ad07/neduw.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/71418634268.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_off000102ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 10648 bytes
SHA-256: 7b40ed8dbe3c72d273cb33e652f8233ac157a52b98b88231e997d5c95effe2c3
font_01_sfnt_off00011b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13323 21676 bytes
SHA-256: ba29dfe4e4b807e8be366453c617b96dd2fec2c849b950bec9b29c2615646655

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