PDF malware analysis — malicious · 2d7d161ca116b6d8

MALICIOUS

PDF

118.7 KB

MD5: d00da805e11e9e73aba5b09b43167b96 SHA-1: b4c7c57ede6c3558c3f9693fd5c438f32572c1e9 SHA-256: 2d7d161ca116b6d828ca0962ff1e6231acee0911e595bc56c8e5a93812f43ae2

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, including a call to eval() and a large comment-padded JavaScript eval stager. ClamAV detected this file as Pdf.Exploit.Agent-36086, indicating it's a known exploit. The presence of JavaScript and the exploit detection strongly suggest the PDF is designed to deliver a malicious payload.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0006_000.js` `093df6eb8de09ec0312f61bbfb89d117c4a29d918e87d5c697f364cf12c43fc3`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627443 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).
`stream_001_off0001d735.bin` `c55b07cb785b43d4e3c89bee69f74d53f6cf4954a6645c2c57f9c6c6fd780879`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D735	300 bytes

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