PDF malware analysis — malicious · 3d22b455007f4316

MALICIOUS

PDF

35.5 KB Created: 2009-05-01 21:21:45 Authoring application: tvEeSFCPx (via NeTSnrx)

MD5: de54b83f8cb044c1d8a947f7a97d09b4 SHA-1: 2b3dac5926e66aa3f38ca096573049b76448cd5a SHA-256: 3d22b455007f4316ca994fd95ee5630daae7cc6fb8c3722effb7e0709e673ed7

172 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. The generic stage recovery heuristic suggests that the script is designed to download and execute a second-stage payload. The ML classifier strongly flags this PDF as malicious. No specific family could be identified due to the generic nature of the obfuscation and delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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
Generic recovered JavaScript exploit stage high PDF_GENERIC_STAGE_RECOVERY

Bounded static stage recovery exposed hidden JavaScript through generic transforms such as null-byte collapse, percent decoding, marker replacement, arithmetic character codes, fromCharCode, numeric arrays, or hex literals. This rule is emitted only when the recovered stage contains exploit-like Acrobat JavaScript or shellcode markers.
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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. 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.
ClamAV scan did not complete on extracted artifact info CLAMAV_SCAN_INCOMPLETE

ClamAV did not complete on 6 carved artifact(s); EXTRACTED_FILE_CLAMAV may be missing for this run. The result is not cached so a later submission will retry the scan.

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `8220c6d77d53ec9b17e29d9202f368102816bb514dcbf4d3a29a01760eaf8744`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35126 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `0608e2bdfe829e74bba6252f3489be33d8776a80f1f93d713671ed55a3412d59`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35039 bytes
`generic_stage_recovery_000.js` `b56af5917baf80955b62bc44f4380c96dd2df735f9e21911711bffd64d07ea6c`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 7 at offset 0x215	26502 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`generic_stage_recovery_001.js` `2ad85955437dcd11e45e674347d0a6390b084e8c34a6ab96fe01123b29a8c184`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 7 at offset 0x215	26415 bytes
`generic_stage_recovery_002.js` `6e6dbe577edf5b338a90cbc1d083fafff70d08c3abd5a928bb1b4460a368edf9`	deobfuscated-js	generic stage recovery percent-decode -> percent-decode from JavaScript object 7 at offset 0x215	26292 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`generic_stage_recovery_003.js` `ab2a0be9f947665b81f86db3444ea7b84486aff2731697bfe0bedd659932c6b2`	deobfuscated-js	generic stage recovery percent-decode -> percent-decode from JavaScript object 7 at offset 0x215	26205 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.