Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba4ef154a81fd85…

MALICIOUS

PDF

51.2 KB Authoring application: Mobipocket Creator
MD5: fb02a8e501ffdc697c0092de178652b2 SHA-1: 5945d48bbbd0ebc252be78450274d8c88a0b2692 SHA-256: 7ba4ef154a81fd85c171b4abd369808864533b096a067ca6a665ecba29913b05
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a potential for further malicious downloads or redirects.

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 http://richardsonplumb.com/uploads/1/3/0/6/130621158/dinibefepuwanuvejipu.pdf
    • http://ngabwe.com/uploads/1/3/0/2/130271051/sesujinu.pdf
    • http://whatwonderfulwine.com/uploads/1/3/0/6/130604333/xivifutovoxibabunon.pdf
    • http://colacotwayartstrail.com/uploads/1/3/0/3/130379155/72771.pdf
    • http://cantonfair2u.com/uploads/1/3/0/2/130287895/ab2fe55aae05a.pdf
    • http://kathleenmaree.com/uploads/1/3/0/3/130323212/2876669.pdf
    • http://michiganlegalmalpracticequestions.com/uploads/1/3/0/5/130551000/c539b.pdf
    • http://spiritascend.com/uploads/1/3/0/6/130621197/samiledezalaga.pdf
    • http://nanonow.nl/uploads/1/3/0/6/130604210/c08ca3148270.pdf
    • http://nataliekopitzke.com/uploads/1/3/0/5/130589244/busojujedadikojekov.pdf
    • http://timothysmithactor.com/uploads/1/3/0/6/130621859/zojolu.pdf
    • http://kubbsjewelryandfashion.com/uploads/1/3/0/5/130551019/728b13319c244d.pdf
    • http://newzealandcreativespacesstudioweebley.com/uploads/1/3/0/5/130550971/130550971.html#calculate+percent+change+in+google+sheets
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000140b.bin
dce91159806153c2ae51aa6de7d92e8a522c634775fd56827ee63bdd06c9d8d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140B 10188 bytes
font_01_sfnt_off00008211.bin
65ca2fa633a49bc637c245e3469a24bec82cbb291b9200d770c42ee2df1588ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8211 16096 bytes

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