PDF malware analysis — malicious · 217a3aacb0fafa41

MALICIOUS

PDF

13.8 KB Created: 2010-09-08 07:39:11 Authoring application: log aft

MD5: 7ff11f85b74382b321e67ad7b02141a1 SHA-1: 14595d05613aaacda984a25e245e1f5088de2c1a SHA-256: 217a3aacb0fafa415d1c6e4897ffc1be8d598185043e2d97b2ae6f87c25f3b02

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF sample contains critical XFA JavaScript heap-spray exploit code, indicating an attempt to exploit a vulnerability. The presence of embedded files, including a large suspicious binary, suggests a downloader or dropper functionality. The unescape() call and XFA form script further support the exploit vector. The exact payload or ultimate goal is not discernible from the provided evidence, hence the family is unknown.

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_obj0001.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0xA6F	84 bytes
`embedded_file_obj0005.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0xB20	228 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xC11	199 bytes
`embedded_file_obj0008.bin` `e775d1dea547705e40fc582961ad168d6a92891a2c5fe83439a1502e2d5efc49`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD01	119 bytes
`embedded_file_obj0012.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xDB9	77 bytes
`embedded_file_obj0010.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xE60	56 bytes
`embedded_file_obj0017.bin` `1ff829a62489c68fb62a0ddca08e7966f1eef965c19dbf4dd91d420ae9dcdf7c`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x119D	15088 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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