Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b84b882312d87d6…

MALICIOUS

PDF

44.7 KB Authoring application: SWFTools
MD5: a0844e469ef7fa0a2250c7a1fb680b35 SHA-1: 280071fa03164e3036d1cd95f7156b758e4ab340 SHA-256: 8b84b882312d87d663ecd848da6a57257dc4ac6efc0d142afc47202ff454babe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary attack pattern involves redirecting users to a link farm of potentially malicious or spammy content hosted on numerous domains.

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://buildyourbody.online/uploads/1/3/0/4/130488920/garuzujopefipapu.pdf
    • http://jer-zu.com/uploads/1/3/0/4/130483309/4800583.pdf
    • http://vumabo.nice-buy22.ru/uploads/2020/01/28/ponusikomuw_nifade.pdf
    • http://livegreaterdayton.com/uploads/1/3/0/4/130488387/5912505.pdf
    • http://nothernlotusayurveda.com/uploads/1/3/0/3/130379252/802917.pdf
    • http://myneosystems.com/uploads/1/3/0/4/130436343/juzebomakeso.pdf
    • http://reddoorcmgroup.com/uploads/1/3/0/2/130271011/berelasitanaje_batelujivosu_sewalidake_nosuve.pdf
    • http://peacelovemonkey.com/uploads/1/3/0/3/130323141/jisotene-wudorofulez.pdf
    • http://barneshealth.weebly.com/uploads/1/3/0/3/130323127/2585656.pdf
    • http://xoglamaccess.com/uploads/1/3/0/7/130739253/ruwevonoxilujer.pdf
    • http://rehphotography.org/uploads/1/3/0/5/130590770/130590770.html#le+loup+et+les+brebis

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001301.bin
507f9c2f721cdd31add58b1402b0e0db6abd8fd5a7d773afbd3e28035b399a5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1301 10268 bytes
font_01_sfnt_off000068af.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AF 16036 bytes

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