PDF malware analysis — malicious · ca07aba539a71a2b

MALICIOUS

PDF

13.3 KB Created: 2010-09-08 11:37:07 Authoring application: twa sad

MD5: 1515826629511c3e0063bd2a9a772d3f SHA-1: aa921ef5aa2cd6bbc78a7546a404b141cc1e3846 SHA-256: ca07aba539a71a2bb1ff2d371dca259306620099499acabe2fe6a7e2e942399b

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains critical XFA JavaScript heap spray exploit code and risky executable scripts within its streams. The presence of 'PDF_XFA_HEAP_SPRAY' and 'PDF_XFA_SCRIPT' heuristics strongly indicates an exploit targeting XFA forms. The 'PDF_UNESCAPE' heuristic suggests obfuscated JavaScript is being used. The embedded file 'embedded_file_obj0015.bin' is likely the secondary payload downloaded and executed by the exploit. The overall goal appears to be the execution of arbitrary code via a PDF vulnerability.

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 0x880	84 bytes
`embedded_file_obj0016.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x932	228 bytes
`embedded_file_obj0010.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xA23	199 bytes
`embedded_file_obj0014.bin` `63caf157bbc61966a2b6e2ada99cef782ddb6ec209e861df14e6f0b2af25ff86`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0xB14	119 bytes
`embedded_file_obj0006.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xBCA	77 bytes
`embedded_file_obj0007.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0xC70	56 bytes
`embedded_file_obj0015.bin` `a775c2328315006adc5298dcccf14572777d065928df7660c5346c466682ed76`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xFA8	15026 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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