PDF malware analysis — malicious · 6329765f09dc93bd

MALICIOUS

PDF

16.6 KB

MD5: 246b212cee1651a70d1cb968d9115104 SHA-1: 34a3351d90e25ba98cb8b78db8503ff1e2ebcdae SHA-256: 6329765f09dc93bdb4acd7a455c3c3f90d1127af337f36a5c81e1d229a5e053c

194 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file exhibits strong indicators of malicious intent, including high-severity heuristic firings for JavaScript execution, eval(), and unescape() calls, along with ClamAV detection of obfuscated objects. The presence of embedded JavaScript streams, specifically 'javascript_obj0116_000.js' and 'javascript_obj0123_002.js', suggests that the document's primary function is to deliver and execute malicious scripts. The ML classifier also strongly flagged this PDF as malicious. The obfuscated nature of the JavaScript and the lack of readable document body text prevent a more precise determination of the ultimate payload or delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0116_000.js` `075f873054e8a68115515157258e2e24be9f4bf99b75944d2de62b2cf1772580`	pdf-javascript-stream	PDF /JS object 116 at offset 0x4BB	45489 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 256 eval/decoder/string-building token(s).
`javascript_obj0123_002.js` `628f8945cb8b1acc1aaea7e4646681713eb227911961a4cabade216c7476721a`	pdf-javascript-stream	PDF /JS object 123 at offset 0x386	16122 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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