Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8d9622ba2781ed…

MALICIOUS

PDF

89.0 KB Authoring application: pdf-parser
MD5: 642326345c7ecee332cd4df1d2bc0bc2 SHA-1: bd208e93d3a678d0738749cf315c3eadb9769c6e SHA-256: 4a8d9622ba2781edd9d2e273a3613b7a20164ed035378cc2fe13f96dd70b1598
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, which is a common technique for phishing and malware distribution. The ClamAV detection further confirms its malicious nature. The embedded URLs likely lead to further stages of infection or phishing content.

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://elysianresources.net/uploads/1/3/0/2/130288589/3610258.pdf
    • http://tllafleur.com/uploads/1/3/0/3/130312974/daroxif.pdf
    • http://downdogz.com/uploads/1/3/0/2/130288533/e024b2029.pdf
    • http://iweargreatness.com/uploads/1/3/0/6/130605162/130605162.html#inglourious+basterds+2009+free

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00006ca6.bin
5ad94c19aabe038d4001e81cf69477a355b59e65452c9c26edfe2c41d2447420		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6CA6 24460 bytes
font_00_sfnt_off000010e6.bin
5031853d0fd5506620f7dc2c61423c5eaef2a28f434f118e94f3561149c293c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6 10824 bytes

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