PDF malware analysis — malicious · 29bcaff8e3b2a58e

MALICIOUS

PDF

4.4 KB

MD5: 014f6b1a15ee44d89327519d077f66ac SHA-1: 90ef4e8f58232a45325465645aa8fe2c3b0f95cf SHA-256: 29bcaff8e3b2a58ec1c9471f5d737c6d883a349c15c3d7bbef00829115233491

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by multiple engines, including ClamAV with the signature 'Pdf.Exploit.Agent-36898'. Static analysis revealed embedded JavaScript, indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics. This JavaScript is likely responsible for exploiting a PDF vulnerability to download and execute a secondary payload, as suggested by the 'ML_NYX_PDF_MALICIOUS' score and the detection of a suspicious extracted artifact. The exact nature of the payload could not be determined due to the lack of further analysis on the extracted binary.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36898 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36898
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0020_000.js` `bbd418d8aea564616c48c255859caf0f5ecac1fefd3bdb4f86aae7ade4658d3a`	pdf-javascript-stream	PDF /JS object 20 at offset 0xDF5	261 bytes
Detection ClamAV: Pdf.Trojan.PIDIEF-1 Obfuscation or payload: unlikely
`stream_000_off00000197.bin` `d5194130252800b78e95a9e9326fb458b3f2eb2df15ee7aaa927258972bccad7`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x197	10083 bytes
`stream_001_off00000645.bin` `b4be512127d79a5b23881b5aa3c9f9997ee1f29c8a4627072992d53a4fefa719`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x645	10077 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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