Malicious PDF — malware analysis report

Static analysis result for SHA-256 646f64fdcf18ff17…

MALICIOUS

PDF

54.1 KB Authoring application: Karbon
MD5: d13b1b590ecefa2692904f5a755bc39c SHA-1: df9d046627f2784fada920246b20a56c033f0d84 SHA-256: 646f64fdcf18ff17187e5bcdf44b7cbbc7936697ee04014292070b7b6602871b
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, indicating a phishing or traffic-generation purpose. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://poliotoolkit.org/uploads/1/3/0/6/130620946/6260873.pdf
    • http://thecreativetrap.net/uploads/1/3/0/4/130436250/zolibidodova.pdf
    • http://ratix.net/uploads/1/3/0/7/130775846/04a0ddcf2d.pdf
    • http://www.karengriffithsconnect.com/uploads/1/3/0/3/130313307/1770080.pdf
    • http://74-123-76-252.mgwnet.com/uploads/1/3/0/7/130775013/tositufetodagu.pdf
    • http://daisykim.com/uploads/1/3/0/5/130588545/15437c.pdf
    • http://lauralemay.net/uploads/1/3/0/5/130589085/bapunev.pdf
    • http://contemplativecommunications.com/uploads/1/3/0/6/130604656/4565534.pdf
    • http://homesforautoworkers.com/uploads/1/3/0/2/130291689/befoxuvuwibaw-jememidon-veluxumegupeduw.pdf
    • http://kendubner.org/uploads/1/3/0/5/130588457/ninisedufu.pdf
    • http://74-123-72-189.mgwnet.com/uploads/1/3/0/5/130540155/130540155.html#coast+to+coast+trail+route+map

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ecd.bin
7f3f99fac8ac2da63bfc2499b73df3e28f95b81f81e79283c01609e62c05ea83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECD 1756 bytes
font_01_sfnt_off00007a86.bin
e023a02a88f6b493f5ec6ec9d1be1561b29945153624a4aca741fbc1bcc3c55e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A86 9364 bytes

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