PDF malware analysis — malicious · 5a88b69e668b1967

MALICIOUS

PDF

33.0 KB Created: 2009-12-27 22:22:35 +03:00 Authoring application: dummyMakeVery (via b6090cd636e93a4a4574e97002734900)

MD5: 269d206cfd8d2f12aba73f5dd4d571fe SHA-1: ae02c8da1a1083fd875915097ec3aaa2c702cd3c SHA-256: 5a88b69e668b19676a79a833eeff3ecd6a9a859d41c3ca32e69f21d486d660f1

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript streams, one of which is heavily obfuscated and uses eval() to execute its content. This pattern strongly suggests the script is designed to download and execute a secondary malicious payload. The ML classifier and ClamAV heuristics further support the malicious nature of the file. No specific family could be identified due to the obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 0.9972

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: 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 (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.
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
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_obj0014_000.js` `0f0238137782a1f745fa9b014b6ccb7a46b83a92c88bbf29bc19fa346d4e6878`	pdf-javascript-stream	PDF /JS object 14 at offset 0x1A42	37530 bytes
`javascript_obj0016_001.js` `759dab276568f54862b8ac6ea329f66254ecbb92567e360c5ff92d3e0187e24a`	pdf-javascript-stream	PDF /JS object 16 at offset 0x78B8	1577 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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