Malicious PDF — malware analysis report

Static analysis result for SHA-256 be873120774cda71…

MALICIOUS

PDF

38.4 KB Authoring application: Karbon
MD5: eef811dee0d56161aecd5e442741f53a SHA-1: 48e53b44948a395d3d762ea24b32f476f499378f SHA-256: be873120774cda714d04592a67dd4c87d6434a717d94f7acdf2fa15bff6c3673
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or to host phishing content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The embedded URLs likely serve as a redirect mechanism to a malicious site or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://townofgettysburg.com/uploads/1/3/0/6/130604703/furogufafeted.pdf
    • http://snowdonia-estateforsale.com/uploads/1/3/0/5/130588927/635302.pdf
    • http://totaalfitamsterdam.nl/uploads/1/3/0/3/130313024/kinakefowobo_nuduridu.pdf
    • http://nokr.nl/uploads/1/3/0/5/130539734/1644060.pdf
    • http://somethingsomethingtheater.com/uploads/1/3/0/5/130551324/4d0e8a9d4483.pdf
    • http://dmmsummit.weebly.com/uploads/1/3/0/6/130621072/7212541.pdf
    • http://navgardenforgirls.com/uploads/1/3/0/5/130588435/7461234.pdf
    • http://ferrotrend.sk/uploads/1/3/0/3/130313638/130313638.html#year+planner+book+template

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000113c.bin
cd694459efb4df1b425fea95adc0b12ca6634df2a9e89195ca93796aaa9b1ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113C 8332 bytes

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