PDF malware analysis — malicious · b32787ec1ef42600

MALICIOUS

PDF

6.9 KB

MD5: 44633060dca99b93afd49b2dee516a8b SHA-1: 430854126adc19767b4d348cb146c0923ad79d17 SHA-256: b32787ec1ef426008f50debf555c2d2e2a296b862d0d6cf42f4dd8c3b907c6cd

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' and the presence of an extracted JavaScript file ('javascript_obj0006_000.js') strongly suggest malicious intent. The JavaScript action, combined with obfuscation indicators, points towards the execution of a malicious script, likely to download and execute a second-stage payload.

Heuristics 7

JBIG2 + active content high CVE related PDF_JBIG2_ACTIVE_CONTENT

JBIG2Decode appears with JavaScript/XFA/RichMedia — a related indicator for JBIG2 parser-exploit families including CVE-2021-30860 and CVE-2009-0658, but not a unique CVE fingerprint.
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JBIG2Decode filter medium PDF_JBIG2

JBIG2 image decoder present — historically used in zero-click exploits
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.
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_obj0006_000.js` `e6ce9a58e3a24f43461fa6e397adbe7133d95170056e0424b6b3a9985882e019`	pdf-javascript-stream	PDF /JS object 6 at offset 0x231	5633 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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