Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e4de8265214aea…

MALICIOUS

PDF

80.4 KB Created: 2021-07-12 20:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f47b31fa771ec13a35b565db5beeb997 SHA-1: eb9c024bd7862dd47bd4853025381629d3b8e419 SHA-256: 39e4de8265214aea8df021ebcd822b05ddfe495718a103ccd47bab7a41ea7ef1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The embedded URL, 'https://medvor.ru/square?utm_term=prince+of+egypt+moses+and+zipporah', is likely used to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://medvor.ru/square?utm_term=prince+of+egypt+moses+and+zipporah
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec794531b0b43e07e5bc49/1626110278055/wopofesapopokagapik.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e81a4052059f1ec1e6d149/1625823809023/best_android_emulator_for_low_end_pc_2gb_ram.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c09e1b56fd05757a33e1/1625866398794/75296181992.pdf
    • 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_off0000da38.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA38 16792 bytes
font_01_sfnt_off0000f24a.bin
745b5a51b9550f56acd5a2c01cd57af269e3d31266404056aa8b8cb9450504f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 16448 bytes
font_02_sfnt_off00011cf7.bin
560abdba8ce979371feea248f7d0a76e02fe984a8e1882d602b95fe61f5486be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF7 11196 bytes

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