Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e79a0a74f65890e…

MALICIOUS

PDF

76.1 KB Created: 2021-07-15 22:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 971c64cee5abf2dc1c25f6d342251078 SHA-1: b60f49ae8bda776cac1914ecdc507b3330d3ef1c SHA-256: 5e79a0a74f65890e42f1e8b5d3e5d207a5cc385c6e46d6ff8379e88a2c5f3125
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan, indicating malicious intent. The presence of embedded URLs, although some are marked as benign, suggests a potential lure or redirection mechanism. The PDF structure itself contains duplicate objects, which can sometimes be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2580

Heuristics 4

  • 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
  • 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/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=queen+in+chess+game
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edda27ea8d40126a1b830c/1626200615362/46760202835.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed41f4493b4338208b80b9/1626161652399/22294403630.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_off0000c90c.bin
a180c67d8c62133a1a31fae6be8130ea5a9c578cb1d580a2063e0e98395b3177		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC90C 16376 bytes
font_01_sfnt_off0000f3b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 16792 bytes
font_02_sfnt_off00010bc9.bin
1d2c26e4754e258ca1cba24796e80817207cd0725bade103e5f318e101f1c4b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC9 10472 bytes

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