Malicious PDF — malware analysis report

Static analysis result for SHA-256 66fff325903c32c8…

MALICIOUS

PDF

46.7 KB Authoring application: QPDF
MD5: c38924173a94662ccd5e0701bda30f7f SHA-1: f099689c38097a1c725909db2a22bdb088c94c66 SHA-256: 66fff325903c32c8d9241d58d87a2466f3169ced5e5123aa15ea19766ad3c90c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external 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, consistent with a phishing or spam campaign. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://millerwebdesignservices.evansconstructionconsultingllc.com/uploads/1/3/0/2/130288565/zewasaxenorava-waluwobik.pdf
    • http://bearsversusbabiesgame.org/uploads/1/3/0/5/130542953/dagewul.pdf
    • http://myallscent.com/uploads/1/3/0/6/130604429/977b45b2aac3d.pdf
    • http://jukeboxarcade.com/uploads/1/3/0/6/130621093/fiziva_gawiz_risamovuzi.pdf
    • http://angelschic.com/uploads/1/3/0/2/130273962/kotelijadixe.pdf
    • http://wbcscholarship.com/uploads/1/3/0/2/130271096/7afacd15531d.pdf
    • http://bitwiseapps.com/uploads/1/3/0/6/130639990/zulumugolupixet-giwexut-zawuvikokavi.pdf
    • http://krgservicecorp.com/uploads/1/3/0/3/130313153/jejapabiza_ruxozig_memib.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/2/130272344/130272344.html#verb+tenses+chart+worksheets
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001200.bin
a40b00e1b94d142694ae98721f9bfe866fcf56306d31d08ad0686c335120db03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1200 8160 bytes
font_01_sfnt_off00006030.bin
1957428794578a072b8983e864e5701b52391162abfb2d6d14c6295fa8a16687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6030 6444 bytes
font_02_sfnt_off00006f98.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F98 16204 bytes

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