PDF malware analysis — malicious · 512ef8d3f7645447

MALICIOUS

PDF

8.4 KB Created: 2011-01-28 23:49:51 Authoring application: PScript5.dll Version 5.2.2 (via GPL Ghostscript 8.15)

MD5: fefda5e146eb6ff3324f4c8bfb26312a SHA-1: e31b6a31f645705d858dccc3711dbc14bb969fb4 SHA-256: 512ef8d3f7645447b1d9d89bc0078ef3f155f5e04536ecdadc1e8c196c18dedf

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of eval() suggests obfuscated code execution. The extracted artifact 'javascript_obj0001_004.js' is likely responsible for downloading and executing a second-stage payload. The document body is largely unreadable binary data, and the metadata indicates it was generated by GPL Ghostscript, a common tool for PDF manipulation.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Additional-actions dictionary low PDF_AA

PDF defines /AA (Additional Actions) that references an executable action (JS/JavaScript/Launch/SubmitForm) — can auto-trigger on document or widget events. Form-field calc/format/validate/keystroke handlers in legitimate interactive forms commonly fire this, so it is reported as a low-weight signal; weaponised auto-execution is flagged by stronger rules (PDF_OPENACTION, encrypted-with-JS, etc.)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_004.js` `a4cdd7ad11edc692d2d995018e0a6a44be58c8443e03b35a53c304a0920bef2d`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	2062 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`font_00_cff_off00000c5d.bin` `83b91037abccd6d47ae8fb66c276820c48d4527c52aec00e30e01afcea3173db`	pdf-font-stream	PDF embedded font (cff) at offset 0xC5D	2011 bytes

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