Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4f39aa98652fab…

MALICIOUS

PDF

75.2 KB Created: 2021-07-13 10:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8ae8c1cc792a7c72bc9d923f91d3d7e SHA-1: 6e2de2e1bfa2e7254b39a4a34c395baef6852ad3 SHA-256: 2c4f39aa98652fab8e56feb965cfd06eac0fd9e7d8fa5adca4599243fd506d38
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, despite some being marked as benign, suggests a phishing attempt. The document body is heavily obfuscated and does not provide clear textual lures, but the overall detection and structure point to 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://feedproxy.google.com/~r/sq/ugae/~3/HbdJGeoIq_s/square?utm_term=i+have+to+contemplate+i+have+to+consider
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8f0b8c19ad4998dbdc16/1626115852082/67017909653.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ecd327b9c492708be9035c/1626133287832/jquery_get_select_value.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_off0000c4c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C0 16792 bytes
font_01_sfnt_off0000dcd2.bin
a6d90e02f4b7606d6208bea13ebadadd40cf67e268b72422fc1b14b93d02f35a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 16716 bytes
font_02_sfnt_off00010849.bin
8c45f792f9543e2a036bd8202c8c865f0b98d43c7fde63ad6f6abf80b1469d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10849 10796 bytes

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