PDF malware analysis — malicious · e3a27264e74367fd

MALICIOUS

PDF

13.7 KB Created: 2011-04-15 21:54:58 Authoring application: mud rut

MD5: b6ffe45eceedbd1f92c10a3c7f38a66e SHA-1: 147410f2c60abcc7d46285a31ca82519ab908fc1 SHA-256: e3a27264e74367fd9508bd004a5ba5ff28bec2450031c084198108f7ca3a3524

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF sample contains multiple high-severity heuristic firings indicating the presence of executable JavaScript and embedded files. Specifically, PDF_EVAL and PDF_UNESCAPE point to the use of JavaScript for malicious purposes, and PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_XFA_SCRIPT confirm that a script is embedded within an XFA form. The ML classifier strongly flags this PDF as malicious. The primary embedded artifact, 'embedded_file_obj0014.bin', is likely the second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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_obj0011.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x172C	84 bytes
`embedded_file_obj0006.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x17DD	228 bytes
`embedded_file_obj0004.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x18CD	199 bytes
`embedded_file_obj0018.bin` `22f9870eec417b8a3c9eed3531581a8df6c21a5a6034ae0edb4c03b0daa7bb91`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x19BF	154 bytes
`embedded_file_obj0019.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0x1A91	77 bytes
`embedded_file_obj0003.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x1B37	56 bytes
`embedded_file_obj0014.bin` `0a84b091214d2ba2ae7cf9611d84d8ae4c0dd6f03ffc3e1f15b8e1c7613de549`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1EB5	20931 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.