PDF malware analysis — malicious · 3ce05a9fb69fbb2d

MALICIOUS

PDF

5.3 KB Created: 2011-04-05 23:46:28 Authoring application: bfub loab

MD5: 8e993831153d4e999c4cbaef9aa596c2 SHA-1: 7e8fc9cec3ffe125d418370ff3ab42c19815eb81 SHA-256: 3ce05a9fb69fbb2d4012e1bc2e88ac7e8d527acf58424d935b8fdb09154faff6

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded and executable script content, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_XFA_SCRIPT heuristics. The unescape() call suggests obfuscation of the script payload. The extracted JavaScript file, stream_001_off00000334.js, is the primary artifact. While the script's exact function is not fully detailed due to potential obfuscation, its presence within a malicious PDF strongly suggests it's designed to download and execute a second-stage payload or perform other malicious actions.

Heuristics 6

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off00000334.js` `b4fc4c6502fc4fcc7f5145a744dc28432b5c762d0fee3c9b033b0918261c98db`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x334	56290 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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