Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e782f85b4b2a9d6…

MALICIOUS

PDF

68.2 KB Created: 2021-10-02 15:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d6f55266822b99f4f62c66fd36de84d5 SHA-1: 366089b05214ab99ba9b64a3ef96927aa1ed91e7 SHA-256: 1e782f85b4b2a9d6590b032cfa4f782567535ae6907619b64ac06c4d713c923d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with a high heuristic score for embedded JavaScript. The PDF contains a large number of external links, many pointing to potentially disposable domains, suggesting a phishing or credential harvesting campaign. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://msmzizkov.cz/data/dokumenty/nelarigu.pdf In PDF document text
    • http://kleinschadenexpert.com/userfiles/file/46680609882.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/sawapodukikeligigojin.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/11342566969.pdfIn PDF document text
    • https://sinaia-vik.com/admin/fckeditor/editor/filemanager/connectors/php/file/29719124890.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/29056770349.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/33276108380.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/79591836768.pdfIn PDF document text
    • http://topaslt.com/userfiles/file/vejojekexabeman.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143e8f0f3fa7---61696547371.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210917215232_1179173341.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/91119907212.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/455760682614a24dbb6c3f.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/34161150618.pdfIn PDF document text
    • http://napiarsaigh.com/images/37116507571.pdfIn PDF document text
    • http://mq-water.net/upload/xosubodebu.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/zeguxidobodutap.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/tilajevabomaliniragun.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/69321597544.pdfIn PDF document text
    • http://yongqingtech.com/d/files/tabezajefavetozimoxidufi.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/funujikosiwagofar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=chapter+5+section+5.1+weathering+answersPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/43015476182.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_off0000ad30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD30 14476 bytes
SHA-256: a777727f1cf750ea6b2ded0f4c77403a10ac464854b374c1ce4501885d36a061
font_01_sfnt_off0000d177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD177 10976 bytes
SHA-256: f52d4023a3bcdd44269795fd10e94057209fa98899a1839c51bda46e51ae5c5d
font_02_sfnt_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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