PDF malware analysis — malicious · 265c579ab97fa8f3

MALICIOUS

PDF

12.2 KB Created: 2010-10-05 14:18:26 Authoring application: pah soy

MD5: 20a6de14fa9c3289b3f85eecbfe89074 SHA-1: edd606a301494bc625dbfd216210b183b660ed54 SHA-256: 265c579ab97fa8f3473b363409b9fd06006726ab8f812ad7309df16f30371a36

210 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

This PDF sample utilizes an XFA heap spray exploit, indicated by the PDF_XFA_HEAP_SPRAY heuristic. The exploit code is embedded within a decompressed stream, as flagged by PDF_EMBEDDED_SCRIPT_PAYLOAD. The primary goal appears to be the execution of arbitrary code, likely to download and run a second-stage payload, as suggested by the embedded file artifact. The ML classifier strongly supports the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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.
XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY

PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
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 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 0xDD0	84 bytes
`embedded_file_obj0013.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xE82	228 bytes
`embedded_file_obj0006.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xF72	199 bytes
`embedded_file_obj0008.bin` `a04308642ec90f29a640ec9826f9eda52498a37d7126d060ccf5623810914ede`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x1062	119 bytes
`embedded_file_obj0018.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x1119	77 bytes
`embedded_file_obj0010.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x11C0	56 bytes
`embedded_file_obj0017.bin` `d0b9d26d51d037da1059c0c25d13d5fb0f99a0379e2cae73c80af83765711328`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x14FA	10718 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).

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