PDF malware analysis — malicious · bae02e7ad1acabc4

MALICIOUS

PDF

29.3 KB

MD5: b73d436dd842e8f9c50eceea56362d8b SHA-1: ce3ebfbdb048bcea714af473c5802a9b1a8bba62 SHA-256: bae02e7ad1acabc41df8f96298fd0cfe1163b4c75f25d6b98cedb6e347ab8a40

274 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1559.002 Component Object Model T1204.002 Malicious File

The PDF file contains embedded JavaScript and a Flash object (SWF). Heuristics indicate the use of eval() and unescape() functions within the JavaScript, suggesting obfuscation and dynamic code execution. The ClamAV detection of 'Pdf.Exploit.Agent' further supports its malicious nature. The embedded artifacts, including a JavaScript file and a SWF file, are likely components of a multi-stage attack, with the JavaScript potentially responsible for downloading and executing further malicious content.

Heuristics 10

ClamAV: Pdf.Exploit.Agent-36098 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36098
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.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`SWFNAME.swf` `a98024b4ee1377e872e3ebaf1c361600c270db5fd5ba79f256106c0c566dde29`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xC34	26777 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `e1ab3bbf30605cecdce6db9d2556198626dbb178f7a4cb471a9436bb6e8bd92f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x838	462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `8e3c7aa31055ecc314e80d4b430f396be2bff7a0da8f0bf005898c7a2de88660`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x64	3482 bytes

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