Malicious PDF — malware analysis report

Static analysis result for SHA-256 452471ebc0e420bd…

MALICIOUS

PDF

35.7 KB Authoring application: Karbon
MD5: db3d437720a4e7d7640e49b1d84c76ab SHA-1: d76055241be2982f0389f129519a7e5357809fd5 SHA-256: 452471ebc0e420bda3105c881757564c8610b4a0dfcc5806e106a6b4770c6f1a
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, a technique often used for SEO manipulation or to distribute malware. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though partially corrupted, mentions 'Alchemist book sparknotes' and includes several of the external URLs, reinforcing the lure.

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://nickgrossman.net/uploads/1/3/0/3/130313494/ferawodot_gepozukujejib.pdf
    • http://myangelabartlett.com/uploads/1/3/0/6/130621708/5047a5663.pdf
    • http://eaglehealthinsurance.com/uploads/1/3/0/6/130603807/newerabawaj.pdf
    • http://nuvueindustrialsolutions.com/uploads/1/3/0/6/130621402/4c22e49a.pdf
    • http://tmw.industries/uploads/1/3/0/4/130483389/ee5180c.pdf
    • http://serdogan.com/uploads/1/3/0/4/130476691/xanegazigovi.pdf
    • http://cottageglenattooele.com/uploads/1/3/0/8/130813972/37ce4.pdf
    • http://mrmacbiblebook2.com/uploads/1/3/0/6/130640114/130640114.html#alchemist+book+sparknotes

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010ee.bin
d0c514833f1160c91e372e48b3feea77b72b97f4e2f57d2a62624b24c64f7fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE 7432 bytes

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