PDF malware analysis — malicious · 987e5b22e98013ac

MALICIOUS

PDF

28.8 KB

MD5: c18d5a2e751434556c7dd31f926ab4f3 SHA-1: cf401d26a657f53c626db803392425db48df061d SHA-256: 987e5b22e98013ac5913029cfc49de84da121b267e9742b35fa6dee031b8ac49

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file exhibits multiple indicators of malicious activity, including embedded JavaScript and a Flash object. The presence of `eval()` calls within the JavaScript stream and the detection of obfuscated objects by ClamAV suggest an attempt to execute arbitrary code. The embedded Flash file (KOuKWkxlCLGrA.swf) and JavaScript file (javascript_obj0006_000.js) are likely components of the exploit or payload delivery mechanism.

Heuristics 7

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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
`KOuKWkxlCLGrA.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x7F5	26993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `9e82aeb06671e06da371d328cfcd93300696ed0ac632fe3d6f7a1294b103ae0f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x15B	441 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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