Malicious PDF — malware analysis report

Static analysis result for SHA-256 14eab54bd8f9eb9d…

MALICIOUS

PDF

83.9 KB Created: 2021-07-31 20:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4f7171e7258a7f46f88be1ee3139833b SHA-1: 7d41c53166dd605cbad3de83ca7c706f951867bc SHA-256: 14eab54bd8f9eb9d89a999a30afd17a5be1c08ff76d83d4378398c4a6f787683
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d2c3c09a5e4131d2c74d3116dc5394ce/jonapebuxoguzarapepap.pdf In PDF document text
    • http://cafehinglung.com/uploads/files/nijoxakivawubazuroxusifok.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/cf6d112644c48dd27064b4e22dc520e6/73330234288.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/2035026583.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/1a973f015906b17c41847bf903bbcd06/63321992385.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/fuxeratomomulabefomevubow.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/paxete.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/32406268955.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/23105827762.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb13781ed30---semituguzu.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/newobozevasegipolejunur.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/nibutazufuxudi.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/b198f189059012a3c8a27367a15385e2/2364076633.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c9af0bc93dd---pajen.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/43622910784.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/mafekajutebi.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/87204863347.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079765e28a70---donokufokodujozeburev.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/nigetotegegotasufutal.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/0e4f69e4dcd7832a82837440c5faf8ce/jedemavujokirujebef.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/15832998671.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/b9df8d271b04919e94cfed5aae533d59/bufovewakuputisigopap.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/sekogaluvebunaguzidudun.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/12108868062.pdfIn PDF document text
    • http://donghotam.com/luutru/files/84378643269.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=descargar+new+super+mario+bros+2+para+android+apkPDF link annotation
    • 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_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 17620 bytes
SHA-256: 683878c7fd719d963a469647f8d4399489ee5c85b3beb9473139d5a2b97b074c
font_01_sfnt_off00010d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 11252 bytes
SHA-256: 4283dc9b51c9ad48af521eb653993714b6dd4190c50a44842eba21963a07a0bb
font_02_sfnt_off0001274d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1