Malicious PDF — malware analysis report

Static analysis result for SHA-256 663df374b536367d…

MALICIOUS

PDF

61.6 KB Authoring application: OpenOffice.org
MD5: c00d80f1c86c239953403466468caaaf SHA-1: 992151448e02e6175b2664a5b252c5604fd5c7ce SHA-256: 663df374b536367d1aa8469605a1bd49303a274cd056b510d15b70bb5bb09923
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute secondary payloads. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://refugefriendsinc.org/uploads/1/3/0/5/130589124/5573175.pdf
    • http://oacmedicalspa.ca/uploads/1/3/0/4/130476981/9a0333e94.pdf
    • http://nextripchile.com/uploads/1/3/0/4/130476065/noneri_megiros_zalodesaluzani.pdf
    • http://as13.com/uploads/1/3/0/3/130323477/2747095.pdf
    • http://shapinguptheupstate.com/uploads/1/3/0/5/130541662/jonafavokifukixazuzo.pdf
    • http://wsgwt.com/uploads/1/3/0/2/130273799/tonoxot.pdf
    • http://foilteeth.com/uploads/1/3/0/4/130483852/1898240.pdf
    • http://mikeintucson.com/uploads/1/3/0/7/130776169/130776169.html#el+alcoholismo+y+drogadiccion+en+adolescentes

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000121f.bin
a4382e40852387d44eef5ef3b46d2886bd4cb2107192396fb72616579d4a0483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121F 9244 bytes

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