Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d3d56899999aca…

MALICIOUS

PDF

34.3 KB Authoring application: Nitro PDF
MD5: ab99828b6d8ed1cf20ecaa1d05dbda14 SHA-1: 118abf1fcc7b36df7bdaeebacf7cc9f411014211 SHA-256: 03d3d56899999acaf9d74a69b5f6e844bffe83a1dd88a2253fdf864eedda0813
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 malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the heuristic 'PDF_SEO_LINK_FARM' suggests the primary function is to link to external resources.

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://lexisexamprep.com/uploads/1/3/0/6/130604382/9441954.pdf
    • http://deparini.com/uploads/1/3/0/2/130271124/roxosivu.pdf
    • http://longtermemergencyfoodsupply.com/uploads/1/3/0/7/130775199/24992b4.pdf
    • http://cheeworks.com/uploads/1/3/0/6/130621771/1056290.pdf
    • http://propietarios.sindelantal.mx/uploads/1/3/0/8/130873954/weviwakoreneni_likuwivo_lowotowufu.pdf
    • http://bellasafety.com/uploads/1/3/0/6/130639269/399fe104eefe62.pdf
    • http://mytajfashionincorporated.com/uploads/1/3/0/4/130435609/0990018.pdf
    • http://camphopeless.io/uploads/1/3/0/3/130323979/3595437.pdf
    • http://augustaconcreteandmasonry.com/uploads/1/3/0/6/130621479/cb8d7795a2.pdf
    • http://nashvilleperformancepsych.net/uploads/1/3/0/7/130738591/1477224.pdf
    • http://themanymes.com/uploads/1/3/0/4/130477003/sikam.pdf
    • http://nalbarra.com.au/uploads/1/3/0/6/130639997/joreb_lifiw_kasugim_somenafudos.pdf
    • http://vtbackcountryskiing.com/uploads/1/3/0/2/130274322/9684667.pdf
    • http://thebernichoteltemp.devsite-1.com/uploads/1/3/0/6/130621194/130621194.html#cuestionario+evaluacion+de+clima+laboral

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cef.bin
0f6d404e3b646588ef75a5e2cf1912b5a5b8889c905d91450977d18e4820fb34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEF 8572 bytes

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