Malicious PDF — malware analysis report

Static analysis result for SHA-256 2978e99bc20a577e…

MALICIOUS

PDF

39.0 KB Created: 2008-03-03 17:06:20 +08:00 Authoring application: Advanced PDF Repair: http://www.pdf-repair.com
MD5: a797d87b43de962002e3ad69b8081881 SHA-1: 918780a72f56d054ba8cd555c297dcb7ea78fe45 SHA-256: 2978e99bc20a577e8707bbb1bcf5559e57335e8cd43940608bf158698fde195e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file exhibits multiple indicators of maliciousness, including obfuscated JavaScript and an eval() call, which are commonly used to execute arbitrary code. The presence of a suspicious JavaScript file (`javascript_obj0038_000.js`) further supports this. The primary intent appears to be the execution of this script, likely to download and run a second-stage payload, as indicated by the `PDF_JAVASCRIPT` and `PDF_EVAL` heuristic firings. The ClamAV detection `Heuristics.PDF.ObfuscatedNameObject` also confirms its malicious nature.

Heuristics 8

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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.
  • 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://www.pdf-repair.com
    • http://www.pdf-repair.com)/Producer(Advanced
    • http://www.pdf-repair.com)/ModDate(D:20100406171120+08
    • http://www.w3.org/1999/xhtml
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0038_000.js
d09b3f8531bbd0b9fb1a15b94dac709f7710e3e969ad94204049ce689fed2ee0		 pdf-javascript-stream PDF /JS object 38 at offset 0x151F 18155 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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