Malicious PDF — malware analysis report

Static analysis result for SHA-256 7930275db7bdf79a…

MALICIOUS

PDF

40.1 KB Authoring application: Nitro PDF
MD5: e1ad55d4012a63b2bedc3531d3d6b9bf SHA-1: 92e3becc0664e0ddfab90e882a84fc4ec6b27fcc SHA-256: 7930275db7bdf79a69267833110b2462a1a31cc62080f29b39cc35c4f085b566
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple URLs pointing to PDF files hosted on various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing and traffic redirection. The embedded URLs likely serve as a lure to download a second-stage payload.

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://modernhomebuyers.us/uploads/1/3/0/7/130776257/19dd754806bb72a.pdf
    • http://poliotoolkit.org/uploads/1/3/0/5/130551809/9d8db15d32c496.pdf
    • http://proindustrial.net/uploads/1/3/0/5/130588395/336538.pdf
    • http://thespeechshop.com/uploads/1/3/0/2/130289573/ganuwenirala_lakotakomad_larunaxiribap.pdf
    • http://mx.rachelshutt.com/uploads/1/3/0/6/130621815/4fb1f0b57e3450.pdf
    • http://rollintruckers.com/uploads/1/3/0/4/130435716/802566.pdf
    • http://stavangerfitness.com/uploads/1/3/0/8/130814611/gabasowexijivule.pdf
    • http://supermayday.com/uploads/1/3/0/2/130288534/3977948.pdf
    • http://blueegg.net/uploads/1/3/0/2/130289045/xinibaku.pdf
    • http://boltprogram.com/uploads/1/3/0/6/130604373/fesositituwo.pdf
    • http://cpanel.stefanaarnio.com/uploads/1/3/0/6/130604681/130604681.html#django+html+to+pdf
    • 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_off00002e1d.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1D 16204 bytes
font_01_sfnt_off00004627.bin
5eb98046046544186775ec3eb6252a8a26b70bf07853474220cad2269cd513a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4627 8180 bytes

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