Malicious PDF — malware analysis report

Static analysis result for SHA-256 060f30edfc2c0bc4…

MALICIOUS

PDF

83.4 KB Created: 2021-09-13 09:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 338cd22fd742b9a32ddf1307075aaf38 SHA-1: 44647cff2d274978d89dd310e3be8c8f7422229a SHA-256: 060f30edfc2c0bc4c6221682e91751d929b1a5cd3c1bc502ec180eaaa9c3a2d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a phishing or link-farming attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://climacom.eu/userfiles/files/tewux.pdf
    • http://stressmanagement-karriere.de/userfiles/file/90154711096.pdf
    • http://ideal-site.ru/userfiles/file/19766070235.pdf
    • https://k-barrierfree.com/FileData/ckfinder/files/20210913_592CDC08812EB18B.pdf
    • http://prplus4u.com/ckupload/files/19087795337.pdf
    • http://kliknetezde.cz/admin/obrazky/file/safilat.pdf
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/28765435487.pdf
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/redifojopamabenem.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/2u807hcb3ced7k7jrmumo74bt2/59348353145.pdf
    • https://ikansambel.com/contents/files/26182644005.pdf
    • https://bientannamhuy.com/wp-content/uploads/files/66360760667.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8f9202565---diduvafofuxen.pdf
    • http://thibangoto.com/app/webroot/uploads/files/kuxotovimijojezetobeziz.pdf
    • http://compow.net/ckfinder/userfiles/files/vigonugijijuzedasewil.pdf
    • https://gornjastubica.hr/files/10559726359.pdf
    • http://lifecontinues.ru/images/files/mudopedagosoxeja.pdf
    • https://cdmsig1.com/ckfinder/userfiles/files/92110925442.pdf
    • http://belean.pl/userfiles/file/xumexebanovobebadafo.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/11877450198.pdf
    • http://goddesshair.net/upload/users/files/bogafelolarilozej.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=download+game+naruto+moba
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e16b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 16792 bytes
font_01_sfnt_off0000f982.bin
8a447c22c716f9f63b768cad5f166e425a31c97c19e166b0d20485e8b6d021d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF982 10660 bytes
font_02_sfnt_off000111be.bin
15e1531b7f333b69de7f217c9e62888cdea9ba5a0336952d216c8f455c2adfcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111BE 18044 bytes

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