Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a06ed154fa4b007…

MALICIOUS

PDF

77.5 KB Created: 2021-07-15 10:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85a73d57944302477170a94adcf16852 SHA-1: 00e527dedd54e1446c5df8b0288abbedf786afff SHA-256: 0a06ed154fa4b0076fc93ac1288a10a8f06e6bfd4d344f57b09222045363e206
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a potential for phishing or redirection to malicious content. The PDF structure and the nature of the heuristics point towards exploitation of vulnerabilities within the PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/pL_UGxDroB4/square?utm_term=advanced+paediatric+life+support+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee7a696bb0602df214f527/1626241641898/9369876671.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee8a717dee9f188f7c8cb3/1626245746074/juwaxefufupovofedik.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecabddc32416487af34f90/1626123229624/all_yellow_colors.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_off0000ccb1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB1 16792 bytes
font_01_sfnt_off0000e4c8.bin
45cfd94c5775956be1355af882552549b49e40af9e0e941bd6b5fb43c38f3041		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 10760 bytes
font_02_sfnt_off0000fdb5.bin
5cd76686f6a56295b804c1bc1a986ef44fa9abf3625825d77de5e66eb2c279ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 17040 bytes

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