Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe61b4054d13c47e…

MALICIOUS

PDF

43.9 KB Authoring application: ImageMagick
MD5: df08238ea89c17368af9cf71c3b9e9ec SHA-1: fe70b2c0710ee34c3636cdc90841f153ac58dbd6 SHA-256: fe61b4054d13c47e22446e72f9cae74e17ccf53dcd4da304c56915994b77adf1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or distribution mechanism for malicious content. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted from this sample, but the sheer volume of external links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://narayanaresidences.com/uploads/1/3/0/2/130289543/2673846.pdf
    • http://www.yucatandiscovery.net/uploads/1/3/0/6/130620390/5e2917f6.pdf
    • http://strangebrau.com/uploads/1/3/0/3/130323236/zaximadoxomugisini.pdf
    • http://zenwich.co/uploads/1/3/0/7/130739048/5029614.pdf
    • http://badjoybombshell.com/uploads/1/3/0/6/130639854/kewiwez_soxarevawe.pdf
    • http://sweetridersexpressllc.com/uploads/1/3/0/2/130287942/lewapalavosegeguxeza.pdf
    • http://tirerepairrichmond.com/uploads/1/3/0/6/130621896/girej.pdf
    • http://stephengilardi.com/uploads/1/3/0/8/130814248/6cae1b65.pdf
    • http://pisec.org/uploads/1/3/0/2/130289201/zuliwafirakox-donosivukuxojup.pdf
    • http://equestriansupply.co.nz/uploads/1/3/0/7/130740073/943a1b32.pdf
    • http://writing4content.com/uploads/1/3/0/4/130488696/838d90c3249f0.pdf
    • http://wrentham.shop/uploads/1/3/0/5/130588735/wovojabix.pdf
    • http://insidedentalequipment.com/uploads/1/3/0/8/130814245/guwenujulen.pdf
    • http://mindtoys.net/uploads/1/3/0/7/130776503/6303859.pdf
    • http://presqueassezbien.com/uploads/1/3/0/6/130639026/jawizakepigi.pdf
    • http://herbalalliance.org/uploads/1/3/0/2/130287314/vojigemipe_wuduval.pdf
    • http://revolutionofsenses.org/uploads/1/3/0/5/130545189/9444073.pdf
    • http://10dayfilm.org/uploads/1/3/0/6/130604575/2857570.pdf
    • http://dredwinkurniawan.com/uploads/1/3/0/5/130541346/kunolotam-zanewimevozuga.pdf
    • http://oarkridgefarmsonline.com/uploads/1/3/0/6/130620776/9284628.pdf
    • http://jimability.net/uploads/1/3/0/4/130435536/61ff626cda1917.pdf
    • http://connectumarriageministry.com/uploads/1/3/0/5/130541209/zagadabigowaxoku.pdf
    • http://systemskateboards.com/uploads/1/3/0/5/130544232/1e4f12dab8.pdf
    • http://adsl-208-190-128-196.atcoflex.com/uploads/1/3/0/2/130270934/130270934.html#el+budismo+sin+creencias+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c8.bin
fc0bcc9d08d908b8b1287d0ab2df4e3a5be78b1d1690d8efe3ff9d2c54ab5679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30C8 16064 bytes
font_01_sfnt_off00004878.bin
f5e7b5ad93ba5d2c44d8f96197763bc869d9bbd22a4cb9b8c83db859587e7eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4878 8904 bytes

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