PDF malware analysis — malicious · bd5c2450a20fef1e

MALICIOUS

PDF

5.1 KB Created: 2011-04-05 23:46:28 Authoring application: bgffub lodfab

MD5: 422dfcd3d69e2be4087c4a2b4f1668fb SHA-1: 657f8597c7e9f131af8267057986d5e5efaebcf3 SHA-256: bd5c2450a20fef1e70e7b8eb59821faa3e6506c24460c476dc1f3ef15f4edabf

120 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_XFA_SCRIPT heuristics. The unescape() call and the extracted JavaScript file (stream_001_off00000340.js) suggest an attempt to obfuscate and execute malicious code. This script likely downloads and executes a second-stage payload, contributing to the overall malicious nature of the document.

Heuristics 7

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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_off00000340.js` `cf6cd1050c1f5b37f8f581912b184ec028cc5418b8b2f38d5825f9b8a056283e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x340	55138 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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