Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b15f9519139661…

MALICIOUS

PDF

110.6 KB Created: 2021-07-13 03:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1beab41f968f5526804e1e17e5dbfca1 SHA-1: 5c00c82205236f81901012a1575cacb2a3a19488 SHA-256: 58b15f9519139661445be5fda2e0c16ab01720f118c9af1b9df71dba4e403070
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. It contains embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing attempt. Although the document body is heavily obfuscated and unreadable, the presence of external URIs and the ClamAV detection strongly indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.1264

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://feedproxy.google.com/~r/sq/ugae/~3/WVKuihPcy9U/square?utm_term=pharmaceutical+care+process
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eccaeaccf7306dfd75ac3e/1626131178607/pokudebekimugop.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e93ce46e267257943bb670/1625898213152/source_code_to_executable_file.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_off00015027.bin
c4871ca6c052d626c84d6f9bc3716a233d772f21165f4f1d6cd01cd67c38be9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15027 18076 bytes
font_01_sfnt_off00017f30.bin
7b0408944ecd39a39ccdfd0428c28e55bbf732df9718c431e72d4ba93b104a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F30 10636 bytes
font_02_sfnt_off0001978a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1978A 16792 bytes

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