PDF malware analysis — malicious · 8cf2b6acc52bf652

MALICIOUS

PDF

11.9 KB Created: 2010-09-22 03:29:48 Authoring application: ich zin

MD5: 8557115b0eeb9ea44b388d954a236a60 SHA-1: 258459d5de6a7f53fa4a85465765026ee6c0db96 SHA-256: 8cf2b6acc52bf652948729c55c45228328c06a4a166c391e6409240b5a425756

178 Risk Score

Malware Insights

The PDF file contains XFA (XML Forms Architecture) which is known to be a vector for exploits. Heuristic firings indicate PDF_XFA_HEAP_SPRAY and PDF_XFA_SCRIPT, suggesting the presence of exploit code designed to spray the heap and execute arbitrary commands. An embedded file, 'embedded_file_obj0006.bin', was also detected, likely serving as the second-stage payload. The exploit code is likely responsible for downloading and executing this payload.

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_obj0010.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xACD	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xB7E	228 bytes
`embedded_file_obj0019.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0xC6F	199 bytes
`embedded_file_obj0002.bin` `36c4684791390ced634e8ff0ef6c77cd56b0c6e8e485061d45888feef8c19055`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xD5F	119 bytes
`embedded_file_obj0011.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xE16	77 bytes
`embedded_file_obj0012.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xEBD	56 bytes
`embedded_file_obj0006.bin` `06f392e6215b6e4ff162a958fb8082859f98b98ad5ddee188b26ecf6f1ee26d4`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x11F5	11089 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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