Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffe4595af7bfa37…

MALICIOUS

PDF

51.3 KB Authoring application: Mobipocket Creator
MD5: 3170f648ee72a1135f575f9920a53fc1 SHA-1: 51ba5f6fa5979196d5b92d812b7c6fb95a4b3dd2 SHA-256: 7ffe4595af7bfa37d9e612c226c2821012cf8e526d4d887b3e295089456b02a9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://mindlab-uk.org/uploads/1/3/0/5/130588913/4728452.pdf
    • http://technotrickster.com/uploads/1/3/0/5/130588515/452513.pdf
    • http://akpartnership.org/uploads/1/3/0/5/130542755/mekugigasazumuzajaw.pdf
    • http://bloompropertysolutions.com/uploads/1/3/0/7/130775907/a340cb2e8a.pdf
    • http://drmegangomez.com/uploads/1/3/0/6/130639809/dipikifitinev_titaxep.pdf
    • http://artofburkinafaso.com/uploads/1/3/0/6/130620720/63dbbdd61a0e43.pdf
    • http://livelocalcard.com/uploads/1/3/0/5/130544070/90dd0d8.pdf
    • https://titifoxupetapa.weebly.com/uploads/1/3/0/2/130272585/foxizofobegop.pdf
    • http://callihanenglish.com/uploads/1/3/0/2/130272086/dd406276d5ffa.pdf
    • http://novaimmobilien.eu/uploads/1/3/0/4/130435722/eb016.pdf
    • http://moniqueyin.com/uploads/1/3/0/6/130604962/nugagaki.pdf
    • http://allergy.mediutopia.com/uploads/1/3/0/4/130489363/130489363.html#probit+model+interpretation+stata
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001373.bin
b3875a9ee1e3dde08ada872a344e93daba68d9ffa218053f1aa1dcdda813dfdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1373 9620 bytes
font_01_sfnt_off00008cb3.bin
c048ac4ed90d63bfae46472f65f9cf6fc0bd5e75369f2d8f28771a6d96a2731c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB3 3156 bytes

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