Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd42b436b903d50f…

MALICIOUS

PDF

37.4 KB Authoring application: Scribus
MD5: 087f6d09ed4f38878d1428fa509fadc0 SHA-1: a7dc92b0176a51cd02cf4a3a933d32169cd65ebc SHA-256: cd42b436b903d50f134b44025cd4de2936d4f6955c2106f6b2cb228c12c18873
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or phishing campaigns. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body itself is largely corrupted but contains some of the same URLs, reinforcing the link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 https://vopajadebed.weebly.com/uploads/1/3/0/2/130272080/3145191.pdf
    • http://fisup.onlinehelp-myaccount.net/uploads/2020/01/28/vosopivejona_kusap_zaxuraloxikab_givexafusaza.pdf
    • https://mamelijedudi.weebly.com/uploads/1/3/0/3/130324136/butubat.pdf
    • http://nixegal.bibaiboba.online/uploads/2020/01/28/5732e633ea05.pdf
    • http://ssexxess.com/uploads/2020/01/27/425367.pdf
    • http://bignightconsulting.com/uploads/1/3/0/3/130379597/vonawifamapi-kesepunag.pdf
    • http://repatunuxe.copyrightcontact-1000021974142.com/uploads/2020/01/28/49eecba.pdf
    • http://maxvanderree.com/uploads/1/3/0/6/130621106/fopepukazedi.pdf
    • https://vodojapixo.weebly.com/uploads/1/3/0/3/130323937/xubuladogepid.pdf
    • http://noworriesitaliantutor.com.au/uploads/1/3/0/6/130604729/495b6c01c52550d.pdf
    • http://iowajuniorcamp.com/uploads/1/3/0/5/130590567/469749.pdf
    • http://crystalwittenutrition.com/uploads/1/3/0/2/130272283/af217bef499.pdf
    • http://asenamott.com/uploads/1/3/0/6/130604050/wufub.pdf
    • http://aqulia-urbis.com/uploads/1/3/0/6/130620557/fidivejej.pdf
    • http://afaparents.org/uploads/1/3/0/2/130272504/130272504.html#analogue+and+digital+time+worksheets

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013da.bin
572e45a7043333f504b8b4a16175c005e992381885cad6c918ab3cfc6e19ef49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA 8076 bytes

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