PDF malware analysis — malicious · 5563cf20ec90758f

MALICIOUS

PDF

7.9 KB Created: 2009-05-27 11:29:34 Authoring application: CNGYSZnLizPXmCbcW (via vFCSobbmubSTjDf)

MD5: 67cc329c69b61e5e9e8e289aa52d7744 SHA-1: 6c0b8a33cab9ff8f92e5416211de82884cd489d9 SHA-256: 5563cf20ec90758f6360e4388cc49dc32325f1fb57b896b24a81fbd1cadfb8c2

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The embedded JavaScript stream, named 'javascript_obj0007_000.js', is suspicious and likely responsible for executing malicious code. ClamAV also detected this file as 'Pdf.Exploit.Agent-35572', further confirming its malicious nature. The primary function appears to be exploiting a PDF vulnerability to run the embedded script, which is a common technique for delivering further stages of malware.

Heuristics 5

ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
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.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `6e16437914f09534213116686f27ddbc1eec53c6be969dfc5943ac1da64af424`	pdf-javascript-stream	PDF /JS object 7 at offset 0x32C	6475 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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