Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ceea40e355797b…

MALICIOUS

PDF

73.0 KB Authoring application: Poppler-utils
MD5: aae3dd4e329f25343bbaffccd9eeb9db SHA-1: aa60d22e29bcb8f4a13e662c0218302c08b55c93 SHA-256: 58ceea40e355797b7d40da57a0de670ce549e53caaeff99526ed5f66b3f5fd22
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The 'PDF_SEO_LINK_FARM' heuristic specifically identified a large number of external links, with the primary URL being http://thenestingspot.org/uploads/1/3/0/4/130475965/fitid_xevabedamiv_kebarozesiwida_dozaba.pdf. This suggests the document's primary purpose is to act as a lure, directing users to potentially harmful content hosted on these external domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://thenestingspot.org/uploads/1/3/0/4/130475965/fitid_xevabedamiv_kebarozesiwida_dozaba.pdf
    • http://agnesmusic.net/uploads/1/3/0/2/130273915/32af9b4118.pdf
    • http://joyofsyntax.com/uploads/1/3/0/4/130435734/9925461.pdf
    • http://carpetcleancary.com/uploads/1/3/0/6/130620946/130620946.html#%C4%91%E1%BB%95i+id+kakaotalk

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000123b.bin
00130502244c26b3c86f259ee50f18dfe3ec10be36811ab935db76ab7a8fd1b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123B 11752 bytes
font_01_sfnt_off0000c470.bin
27aad4e7100ae85831cc1a9cf4859e84521ff6b1ee9ac199fa10e6c4d4b25dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC470 2736 bytes
font_02_sfnt_off0000cf6d.bin
21d97b76e04016bc692c81073ff2e1084d4e98967946e85b50f2cbd935a8dfbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6D 24772 bytes

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