Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c79fd77ff3fcbb1…

MALICIOUS

PDF

36.5 KB Authoring application: Karbon
MD5: cfa7e28ac4a8de103a5bf8dcc72023ca SHA-1: 1561686c0645253cb2f49da6190c32634efbdb52 SHA-256: 6c79fd77ff3fcbb14ca2a31bf85fc36e904a4ce225726147b2e239036c7f45a4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The document body, though truncated and obfuscated, mentions 'Letter of resignation template teacher', suggesting a lure. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://rapidrefillsantacruz.com/uploads/1/3/0/6/130604310/ec0d76704a85.pdf
    • http://4thandwallace.com/uploads/1/3/0/6/130605270/borifa.pdf
    • http://perfectcentral.net/uploads/1/3/0/6/130620439/dubotave_fanifujigot.pdf
    • http://metaprotection.com/uploads/1/3/0/6/130639329/99dd670d.pdf
    • http://beingself-centered.com/uploads/1/3/0/5/130588222/130588222.html#letter+of+resignation+template+teacher

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000ff0.bin
79294bab3310d3887ae798d3b32ce66fbc3a934d04db6d62f4509b5295ab2a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0 7652 bytes

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