Malicious PDF — malware analysis report

Static analysis result for SHA-256 9785af241fce8294…

MALICIOUS

PDF

78.7 KB Created: 2021-09-17 16:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 668e1f97b42a446376fe828ca7d470fa SHA-1: 5361cc275141b66211997b36522055bc341f89d0 SHA-256: 9785af241fce8294107383f19e7e133f5f6cf2256771928888c40c1eade7036d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=footej+camera+1 PDF link annotation
    • https://whatproperty.ng/ckfinder/userfiles/files/86117473581.pdfIn PDF document text
    • https://soechi.id/userfiles/file/kibuxakew.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/tivasagafaso.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/lobamipumotufovitak.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/ravunezazeliresavuwowekip.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/62647836571.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/95145368436.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/94796144167.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/68868192866.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/mugaxi.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/wusaregejulujiza.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/15914100662.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210912_F7BC43780DDD9D1B.pdfIn PDF document text
    • https://viettrungson.com/media/Files/sebufesefutagol.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/vegiwo.pdfIn PDF document text
    • https://alley.52886.tw/uploads/files/jiroromebemebezikudama.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/91652147808.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/13607764833.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/17091252641.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16130115747e5f---xasago.pdfIn PDF document text
    • http://allycatering.com/userfiles/13548310747.pdfIn PDF document text
    • https://bor-diing.com/upload/files/55266192776.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/lovune.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/pikixebosulobewijewofi.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/difipa.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_off0000d3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E8 16608 bytes
SHA-256: 358f3e6d5a7a715805eeb129a48b1a2cabf77cb18d87ff4743aaab6581d39e31
font_01_sfnt_off0000fedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDB 10140 bytes
SHA-256: ff2dcb86375bcfcbd60c5986fb2c6ace71b2853b29995213bca7e7e1c4407966
font_02_sfnt_off0001159d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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