Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d4f87d16b3ab84…

MALICIOUS

PDF

54.7 KB Created: 2021-05-23 03:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eacb1696f6e062c9af4ed061541374c SHA-1: 986dc757b32c4eefb9cb4ba9dcac60cae63864cf SHA-256: 79d4f87d16b3ab8422ea47239375d4a55561204cd2674fe99e2c81e88c7f955f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or contains malicious content. The presence of numerous embedded URLs, many of which point to PDF files hosted on potentially compromised websites, suggests a phishing or credential harvesting attempt. The document body, though heavily obfuscated, contains metadata related to PDF creation, reinforcing the nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8204

Heuristics 3

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d73813637b---jowudalajuxebevowukonolu.pdf
    • https://amitadevnani.com/userfiles/file/60739355863.pdf
    • https://foundryindia.org/userfiles/file/timifugizo.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160784eb42dc4b---42095510080.pdf
    • http://dynamic1984.com/user_file/file/30913400276.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/21effff638d13d47902198c2ba1d32de/pepifipejosifebuxesuk.pdf
    • https://kermoulin.com/userfiles/file/76218567023.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160712f1f4a09e---97021797024.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/749922ea45c82c334a24fd44b713dcbd/92309230085.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee5ac54a92---74542814235.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae0acd697f---zojuzegigeludek.pdf
    • https://feng-shuiworld.com/userfiles/file/gireke.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/296f427219816ff1d3b4b595280b9537/zulesesakowovexij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ejercicios+oraciones+simples+para+analizar+pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/7bb5e5cbea6be8e699284313466ae181/godufudizodosuseme.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbef.bin
1547c5484d7a2be5c9649a44757e6f990c43aece74299a504e778a5825a03d10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEF 5384 bytes

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