Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7092efbfb8ff13…

MALICIOUS

PDF

91.6 KB Created: 2021-07-12 22:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbe96a18b4cf2724e6fff7e3fb4637df SHA-1: 34c1ebb6d5bf139a4a8f71abbc12b32a984b62af SHA-256: ae7092efbfb8ff135541515a3ebbec5edd3f1a5488f78f526336c2cb2d2c70a3
104 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'download' button heuristic and an embedded URL pointing to a 'free download' suggests a phishing or social engineering attack. The PDF's content, though heavily obfuscated, likely serves as a lure to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/r_nBws6J8g8/square?utm_term=free+download+autocad+2010+with+crack
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8976a3e9df788e6df996/1626114422390/luziwazakakozax.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8d4205183b3b579df498/1626115394522/45007473270.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8e1ec81c37306b2f679f/1626115614745/gunoxokusumuvajebo.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_off000101cf.bin
0c19b5394edcd3e04312143452b7f1a53b6a3fcd6f5d6480d44dc9e5376d3bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101CF 10848 bytes
font_01_sfnt_off00011ae3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE3 16792 bytes
font_02_sfnt_off000132f5.bin
623f5bfb15b55972c4c627c892b83919c6f3cbd3bb20296671c740f3bcc56c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132F5 18040 bytes

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