Malicious PDF — malware analysis report

Static analysis result for SHA-256 6133a2473edbc770…

MALICIOUS

PDF

35.0 KB Authoring application: PDF Studio
MD5: 2205109ea43168179d6a864c1b588e99 SHA-1: 89861b66c600f2db1edab7e62824114db6a7617b SHA-256: 6133a2473edbc770d94fffef623348b3a3807dca5c54e4f904233baadff69a75
152 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to external PDF files, disguised as ACCA exam preparation resources. This is a common lure to direct users to malicious content. The embedded URLs are the primary indicators of this malicious activity, suggesting a phishing or content-distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://twomachines.org/uploads/1/3/0/7/130776061/wizorimumebimoziga.pdf
    • http://setsdrama.org/uploads/1/3/0/6/130620868/2935125.pdf
    • http://snackopedia.com/uploads/1/3/0/6/130639681/9923366f76c7.pdf
    • http://cfthomas.com/uploads/1/3/0/6/130639242/130639242.html#acca+p2+past+papers+december+2015

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fc9.bin
2a9b30711b194aa17ee7e7e48db77306abfa7c7d9103abf1647c1728f4f1f83c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9 8264 bytes

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