Malicious PDF — malware analysis report

Static analysis result for SHA-256 4360270dd2a4bc92…

MALICIOUS

PDF

75.0 KB Created: 2021-07-15 09:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16ee4a27fb0339ff859edc17a7d42439 SHA-1: e48763684fccf793ebea4f0d21457398000f9f62 SHA-256: 4360270dd2a4bc92ef6afb3328a0653d5a56d399bf114d8e7a7f32f05c48d69e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains an embedded URL pointing to 'laborke.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were extracted, the presence of the malicious URL and the ClamAV detection strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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://laborke.ru/square?utm_term=c+major+scale+notes+piano
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e90cecdb8bb141bad89bd2/1625885932502/29813835997.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee7e55db6052518eca127c/1626242645435/vupuxogulafexabagemax.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_off0000c5e2.bin
7ddcafb45711c117f531d7ca43e9e5eb993b26d5990be51db3c2d893d1a5deb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E2 10696 bytes
font_01_sfnt_off0000de69.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 16792 bytes
font_02_sfnt_off0000f67b.bin
e46f92fa546d0a9e9fe6d20a8c06db4dde4e9702918088a59829703ecff7fe8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF67B 16608 bytes

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