PDF malware analysis — malicious · c056263e8ee55763

MALICIOUS

PDF

14.3 KB Created: 2010-09-09 17:02:51 Authoring application: hag sue

MD5: ab18403e18b92bf231623877063ae2e4 SHA-1: ab235499463f83d4f0fa15dd9b7ee10b6b7d37b5 SHA-256: c056263e8ee557635b53fbb346a803d547dc2cd6ead8ea15722ccc65168bbd5d

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter T1059.007 JavaScript

The PDF sample contains critical XFA heap spray exploit code, indicated by the PDF_XFA_HEAP_SPRAY heuristic. This exploit targets a vulnerability within the XFA form processing to achieve arbitrary code execution. An embedded file, 'embedded_file_obj0005.bin', was also extracted, likely serving as the payload. The presence of unescape() calls and embedded script payloads further supports the malicious nature of the document.

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_obj0002.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xA17	84 bytes
`embedded_file_obj0010.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xAC9	228 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xBBA	199 bytes
`embedded_file_obj0012.bin` `9756fc59dd906f3141ae259552dbe73407b243e68888ff0887d5e51b3cd57d4e`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xCAB	119 bytes
`embedded_file_obj0009.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xD61	77 bytes
`embedded_file_obj0004.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xE07	56 bytes
`embedded_file_obj0005.bin` `522db01a772e7e522b0f0fff85b0f4d092d955b1ccae0be992d7a9afd0857f55`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x1142	16239 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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