Malicious PDF — malware analysis report

Static analysis result for SHA-256 65dded21c6ce4f63…

MALICIOUS

PDF

69.9 KB Created: 2021-09-24 20:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 91525345496e87b3d5ab8b60118523de SHA-1: 2b39727f153a540a04094cb0a60483bff8a2adf3 SHA-256: 65dded21c6ce4f6368cf68357b86a58046e891bc12a1c6807d3352bfad332e21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm pointing to various compromised websites, likely to trick users into downloading malicious content disguised as a game. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://pistant.ru/uplcv?utm_term=download+prison+escape+game PDF link annotation
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fce557b0af---gasisudiwawo.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/68451585764.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/44626116684.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/firazeleligisunizagob.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/48506603391.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/zumoxugaruzajazivuxat.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/29982690131.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/2155fe48b935b0f9f2091dce001c2fc1/mevidonowesada.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/xobamiritipa.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/firutedaruloku.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/90254832245.pdfIn PDF document text
    • https://amgaa.org/temp/files/88413280676.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/babinenumusek.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/18592198190.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/t0137brq6i3h9if9854f6mkqhc/gozuni.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/xazufobi.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/55325520981.pdfIn PDF document text
    • http://aven.su/userfiles/file/83632471601.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161487baf7682d---99008073209.pdfIn PDF document text
    • http://sky1981.com/asset/uploads/files/28145679090.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/34581671342.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/nekogenejafetare.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/39391933745.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/vuborataziraniweroz.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebaaf1e7ab---tazugosajalejo.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/12698480703.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_off0000b1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BA 10844 bytes
SHA-256: 1de870db6d9529f099c3e9ef2410bdbd4e208e771e943d028082f3375998cbec
font_01_sfnt_off0000ca8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29C 15564 bytes
SHA-256: 3f5196085772593c06ee9c0b1aafd4cce704ac005c6c362e1cd252dc0f7ab0b9

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