PDF malware analysis — malicious · 75bf090dbb3b650c

MALICIOUS

PDF

30.4 KB Created: 2009-05-01 21:21:45 Authoring application: ghjkSFghjkCPx (via afdsdgf)

MD5: 82c05fb098da93c6bbaeb31fdf2e9743 SHA-1: 8d6358e4d72688d3e1a636e7491a3c42e25d5675 SHA-256: 75bf090dbb3b650c5b70ac96179d4a66046a694d4ba2be5987b0113fc794bb25

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript that utilizes eval() calls, a common technique for obfuscation and execution of malicious code. The heuristics indicate a PDF JavaScript exploit cluster, and ClamAV confirms the detection of 'Pdf.Exploit.Agent-35587'. The JavaScript appears to be heavily obfuscated, but its presence and the exploit indicators strongly suggest it's designed to download and execute a further stage.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
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_obj0007_000.js` `38e4aa1341638040665cc7ce02b16fb98a0bca4110363021b9bd3b2fcaf9c4ad`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	29883 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `f2bc52995c5ce3587dbeda9ed8ccf2db97b6fbe16c69d6f93ff9c4d16df570ac`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	28915 bytes

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