PDF malware analysis — malicious · b5d6db48f71f04bd

MALICIOUS

PDF

28.3 KB Created: 2010-03-14 09:19:01 Authoring application: EWUibpK (via CoYibweecfX)

MD5: 9252481267581bdca92330bf09204daf SHA-1: a608b63a72237342a614cc5926e3e47bfc63c820 SHA-256: b5d6db48f71f04bd9153bb0365d8cf3593e2400a099e9128f18be5991c16ec9c

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'PDF_EVAL' firing suggests the use of obfuscated code execution. The embedded JavaScript file 'javascript_obj0007_000.js' is the primary artifact. The script likely downloads and executes a second-stage payload, a common technique for initial access.

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.
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` `7019181b03aa888fc6d97f006d8853fe2065af2cca2fe47683ecf36262da846c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23D	27752 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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