PDF malware analysis — malicious · 8fb4282e8f356cb7

MALICIOUS

PDF

13.2 KB Created: 2011-03-29 11:47:10 Authoring application: nos sea

MD5: 963663b3038e6fb8781b0d0b5031f7ec SHA-1: ec95354c8b480bb659cdf22e680304aca44cabda SHA-256: 8fb4282e8f356cb7b8791604302615c836add39dd334245ae16c006ae5d26241

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF sample contains multiple high-severity heuristic firings indicating the presence of executable script and embedded files. Specifically, PDF_EVAL, PDF_UNESCAPE, PDF_EMBEDDED_SCRIPT_PAYLOAD, and PDF_XFA_SCRIPT all point to malicious JavaScript execution within the PDF. The embedded file 'embedded_file_obj0003.bin' is likely the second-stage payload. The script's purpose is to download and execute this payload, which is a common attack pattern for PDF-based malware delivery.

Heuristics 8

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.
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)
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
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0006.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x1493	84 bytes
`embedded_file_obj0005.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x1544	228 bytes
`embedded_file_obj0012.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x1635	199 bytes
`embedded_file_obj0017.bin` `8419bdc9acbf981950e3328481b4277212ffdfdcd37b7dbc0d469494a4ef27d4`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x1727	154 bytes
`embedded_file_obj0018.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x17F9	77 bytes
`embedded_file_obj0019.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0x18A0	56 bytes
`embedded_file_obj0003.bin` `bedb5ff5acf18a762dcd14bbff71f8d7696eba5dfed74889cb71ead6fe21e02e`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x1C1E	21217 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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