Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cad6974aa804936…

MALICIOUS

PDF

75.6 KB Created: 2021-09-07 22:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e34cf8a8435bb7ea3861bdd45b12ebcd SHA-1: bab37340e4669950fc5929f27d35b29c8002c12c SHA-256: 0cad6974aa80493626ad8ebcdc3e661faa3ece66cf1a0a6c14528a892f0d2af8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The presence of these links suggests an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://crysiq.ru/uplcv?utm_term=nuance+pdf+standard+ocr PDF link annotation
    • http://pronobile.com/catalog/file/juvurefekakabebitigevevum.pdfIn PDF document text
    • http://sjanzee.nl/file/felivefujodewevige.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210619_05E8A3D790DF7712.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/jenukilomukotetagi.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tebebanumowat.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/53ab7961a6b32145ecb4898aa1f3a732/zurodokegujovenok.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/bu9m7nheqqbc3nskl18bbv6sr2/kexanuxorifikitufuvi.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b128b7c7b---widafunofi.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/bemarak.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c1dd12cfe---fumubowaropadasage.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/88021504997.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161246ca33d49f---kifasimudowuv.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160800a163c035---xekiwopukiwolokumi.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/10gk8rvq178m6vdsiqqb1o4uc0/96503281213.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/rupexifanotu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ff4c91e57---begafa.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/tovefo.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/fabiwinotarekogitila.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/sumonek.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859980db3a5---pumijixifofusasonavide.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab86c39aa1a---wixijijep.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_off0000c1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C9 10552 bytes
SHA-256: 3102e72d4aeb7008f27f662db8fb1dfdb8080135f32d115b455d9d2dad9878ea
font_01_sfnt_off0000d9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 17960 bytes
SHA-256: d36d974b5780e9550aa97df8b59f27f0673e729a11ddab1ee7e583346421163d
font_02_sfnt_off00010911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10911 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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