Malicious PDF — malware analysis report

Static analysis result for SHA-256 66039c7d507c900e…

MALICIOUS

PDF

73.2 KB Created: 2021-07-14 07:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b28c0e8a4d332f2a1390fe806cf766e SHA-1: 3351b0eec3c761465d1e45592835b12868fda5d5 SHA-256: 66039c7d507c900e47df587de8e7556f733d498fc2df574fe717a2e3db5226b5
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, even those confirmed benign, suggests an attempt to lure the user to malicious content. The PDF structure itself may contain exploits, as indicated by the 'unknown_exploit_score' and the 'PDF_DUPLICATE_OBJ_BODY_INCREMENTAL' heuristic, which can be used to hide malicious code.

Machine Learning

  • Nyx PDF Classifier clean score 0.1749

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/razvivatel/yapz/~3/iXsW93xxTQA/square?utm_term=young+life+talk+ideas
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec91ceb3b63f0898f3171a/1626116558227/lejuzabusanuwesiwodeb.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_off0000c2cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CB 16792 bytes
font_01_sfnt_off0000dadd.bin
8136ddf1e48d9d08176438d3ac50ea37bbd1bfd4ca3c40db59a7c291a9189b5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 15308 bytes
font_02_sfnt_off0001016e.bin
43ea6365986a102f0c8df8cf8cda42321a47e2d7d81277b270267bbd5e2c68d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 10604 bytes

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