Malicious PDF — malware analysis report

Static analysis result for SHA-256 a663a44b3889ade3…

MALICIOUS

PDF

7.2 KB
MD5: 98de5f2d7ccdd4704c051c66e9633342 SHA-1: 34f7f83ea097e4f95c6f936c66991fbe3d5f323b SHA-256: a663a44b3889ade39753aa28ee629c6819a46d8b6075b005f303aaefe0ca8ad3
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. Critical alerts for CVE_2009_0927 (Collab.getIcon) and CVE_2007_5659 (Collab.collectEmailInfo) suggest exploitation of known PDF vulnerabilities. The presence of an embedded JavaScript file and an eval() call strongly implies that the script is designed to execute arbitrary code, likely to download and run a second-stage payload. The ClamAV detection further confirms its malicious nature.

Heuristics 8

  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (matched in decompressed stream)
  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
  • ClamAV: Pdf.Dropper.Agent-7003094-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7003094-0
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0116_000.js
a6dcc1fc15098448f3620ae51b4fc907064d7ae9ce4c141c5c6789c0ad57505f		 pdf-javascript-stream PDF /JS object 116 at offset 0x497 6694 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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