PDF malware analysis — malicious · aa20d9905616a683

MALICIOUS

PDF

20.0 KB Created: 2010-08-04 16:01:41 Authoring application: loosTae loosAve

MD5: 2eb4a94ac35d6f65d1469c8872b49b2d SHA-1: d21950f4ded8a31c14ba9b53c671ba35515db510 SHA-256: aa20d9905616a683d09d23aef9f4c3af0de1cbcf4b99a0c585858618772fc093

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.007 Command and Scripting Interpreter: JavaScript

The PDF sample contains critical heuristics indicating XFA JavaScript heap-spray exploit code and risky executable script within an XFA form. It also embeds a file, likely the second-stage payload. The presence of XFA JavaScript suggests an attempt to exploit a PDF viewer vulnerability to download and execute a malicious payload. The embedded file 'embedded_file_obj0010.bin' is a primary indicator of the malicious payload.

Heuristics 6

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.
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 0x1407	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x14B8	228 bytes
`embedded_file_obj0010.bin` `8b1dacb66262c05f094e1ce0288e7bbde47b414b21a201c64d6ae98feee4be10`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x15AB	28004 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x47D2	199 bytes
`embedded_file_obj0012.bin` `ac0aebc8e377f094d4fddc3f93ed5d913a9e788221a14ad54c15224d3ab93128`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x48C4	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4984	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4A2B	56 bytes

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