Malicious PDF — malware analysis report

Static analysis result for SHA-256 360eda7d6655c20a…

MALICIOUS

PDF

77.9 KB Created: 2021-09-20 09:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dd3bb3e06359434cc3641c06ad26ba2c SHA-1: 3e93a9ab2a883d3b2ab34e520acfff8818ca6fd3 SHA-256: 360eda7d6655c20a0dc24ddb4f836e47a956198b3bc6bbc72a040e774818d7f7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest potential exploitation or redirection mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://medvor.ru/uplcv?utm_term=0+degrees+to+radians PDF link annotation
    • http://140.121.180.103/ckfinder/userfiles/files/bimoxalanamudaw.pdfPDF link annotation
    • http://textstricker.de/benutzerdateien/wesakaxura.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/pojotojibotomamixuzaga.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16144bc7b70bbc---rigotasabawopuv.pdfIn PDF document text
    • https://guruvinodji.com/Userfiles/file/33302581009.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/jozebinosa.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5038152602.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/vibegadiwofewopum.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c65bd58043---saduzu.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/wezedugarijolawosojigimob.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/tibasomurakoto.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161313ce629d24---mudisewuguvewubemisiw.pdfIn PDF document text
    • https://razredna-nastava.net/files/zukegeligudepos.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/totoxidi.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/95240652725.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/17345686314.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/tesotulovexijifudesemowub.pdfIn PDF document text
    • https://spacio.hk/attachment/file/suvifoxiseroxibuxezil.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/jofeteburosux.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/duvagar.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/3t7ht6gnjkdjs2fbab6mftrlqv/pagulowaragezagebekifepu.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/8095326378.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/99925715221.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/ba41965bb752d3dfaa35953458f82bc3/wexunajajum.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/57450650641.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/firuvigolotibodesedi.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_off0000cb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB73 10400 bytes
SHA-256: 6ac1e85858811eb08cd2e869710c8d347bfedff04f1075553697e30cb5297b0b
font_01_sfnt_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 18320 bytes
SHA-256: 5abc98079d01e413d39c7b0769d14c05885f131e9ba7a8886c3ae3640b07341b
font_02_sfnt_off00011232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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