PDF malware analysis — malicious · f60d81c242714acc

MALICIOUS

PDF

15.7 KB

MD5: a3050a712922fa61f8194993d5858dae SHA-1: 2e95f88cb0dc4ccbd58c2eeaae2c3489a6bfea84 SHA-256: f60d81c242714acc08e06a0aaee30e64e6014f6c7965b9a78769b7aebadf952a

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, with high-confidence heuristics indicating the use of eval() and a large comment-padded eval stager. ClamAV also detected it as Pdf.Exploit.Agent-36086. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for PDF-based malware delivery.

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` `e3ce78c3e13a1084274139d28d910cb7d6d69013289070dca252d925bab9ffec`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	425272 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_off00003b76.bin` `b0fc58f9df4029efa307e56de0d6571a03a31597e8a56ae5e3a7698e55764bb9`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3B76	300 bytes

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