PDF malware analysis — malicious · dc374d3d512f7145

MALICIOUS

PDF

14.8 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 30e70bdbc3b607421fa845b2b9415fff SHA-1: 88b1ba5fe93d6ed6696a0878e9315d9ae543a4b2 SHA-256: dc374d3d512f7145cee7c0618dc5342cf94d6192336027148533a55c5cde9726

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains heavily obfuscated JavaScript, including multiple eval() calls, which is a strong indicator of malicious intent. ClamAV detection as 'Pdf.Exploit.Agent-36118' further confirms this. The script's structure suggests it's designed to download and execute a second-stage payload. The reconstructed string 'eval(tts dff[jio ol])' is a key indicator of the obfuscation technique used.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
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.
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.
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_obj0013_000.js` `ad475a55b6848713872a93c73ac6b7befe62a4e314e5824d00b21a2c3e93c8bd`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13587 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).
`javascript_obj0013_001.js` `b1dfd86c643200a064692ea98c688b13ecb071fd38ac3a3ff01652e6d0dbe4fb`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14293 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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