PDF malware analysis — malicious · a1ef03a20bee8e9e

MALICIOUS

PDF

16.0 KB Created: 2010-08-06 11:09:20 Authoring application: plusAla dyedGas

MD5: aea09247d5f1f130355d36a2dcb59f15 SHA-1: a2d4d5adf45a9e9dc05a5f3ae6d29b1681bcaea2 SHA-256: a1ef03a20bee8e9e9e6e67e03879e2debe95a90ce295a93b1b7e81d117ea2841

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File

The PDF sample contains critical XFA heap spray exploit code, indicated by the PDF_XFA_HEAP_SPRAY heuristic. This exploit is designed to execute arbitrary code, likely to download and run a second-stage payload. The presence of an embedded file (embedded_file_obj0010.bin) further supports this, as it is a common delivery mechanism for such exploits. The exact nature of the payload is not discernible from the provided evidence.

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_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x15D7	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x168C	228 bytes
`embedded_file_obj0010.bin` `eef6557d2939f2697b494fc92e4ee011c14b4be1fed61925972e10452be8cba4`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1782	17949 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x3743	199 bytes
`embedded_file_obj0012.bin` `2930f5efc13135f182e81708956debeb3dbf7a7539785b80ea9c6146e57e85cb`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x3838	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x38F9	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x39A4	56 bytes

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