Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63a9dda008c1a14…

MALICIOUS

PDF

78.4 KB Created: 2021-09-16 18:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 601b1ba9f2faccaaaebf22310851b866 SHA-1: e829045640533f53e4bd1227f4a3393a1e37ea1b SHA-256: c63a9dda008c1a14af9d4352aae37a2c1512a52789dd5d2bf5c8ddbd50b1a706
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=xender+phone+copy PDF link annotation
    • http://opsir.eu/files/file/gizugujugofigi.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109031954553993.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/terada.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/mekozetefolabu.pdfIn PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/94346284149.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/daxenazizojud.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/kifozixofo.pdfIn PDF document text
    • https://osakadentalcare.com/contents/files/13376560446.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/96924029302.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/wupoladijijawolowopoginu.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/govivodivak.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/70184627515.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/wupadokitixo.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136c14475852---61649736968.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/puditafemezosopidatoz.pdfIn PDF document text
    • https://tele-video.ru/upload/files/pugevanaxurowemubofe.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/36850205006.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/vutogodojirenawu.pdfIn PDF document text
    • https://ms1oke.com/contents/files/pitovupiruridizamozeba.pdfIn PDF document text
    • https://mihalex.by/files/files/rutalopogi.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/nikupedumumagil.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/e6a2a98e28afc8b99f5e58019894a569/97404298700.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/14829364087.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210916_BBB899807DB3F533.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_off0000ce02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 18272 bytes
SHA-256: ed2962c22ad87d3c52d3c230e3a4e97013517e3a4dc106d8b965d3f4c28d2e8c
font_02_sfnt_off0001155f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155F 10168 bytes
SHA-256: 75555e3a5ea6f0a243fa90a2f06a01338d4dfa9d745817a85faf8de4ddca6389