PDF / .32 malware analysis — malicious · b7e62c6f734c35ef

MALICIOUS

PDF / .32

14.8 KB Created: 2010-09-03 13:47:16 Authoring application: lav lam

MD5: 41ee567b481aee70e282acab70a2ec1c SHA-1: cebcccc3a14f9736708c059505a73d25e6d659ef SHA-256: b7e62c6f734c35ef096b1c499b2575d75bb2e2cdbef03a0799f13a171194029e

178 Risk Score

Malware Insights

The PDF sample contains critical XFA JavaScript heap-spray exploit code. This indicates the file is designed to exploit a vulnerability within the PDF reader to execute arbitrary code. The embedded file 'embedded_file_obj0019.bin' is likely the payload. The presence of XFA forms and unescape calls strongly suggests a malicious intent to compromise the user's system.

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_obj0003.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0xBE0	84 bytes
`embedded_file_obj0010.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xC92	228 bytes
`embedded_file_obj0006.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xD82	199 bytes
`embedded_file_obj0013.bin` `423cc95228c1ebce6ee7a6697ddb190feeab65bc3ac4be71fa0a5cae98b29926`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xE73	119 bytes
`embedded_file_obj0017.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xF2B	77 bytes
`embedded_file_obj0001.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0xFD1	56 bytes
`embedded_file_obj0019.bin` `b3167fa119dbacf05bf84e0911ef60f538cfc422e221ff3fa54a4cb19a269fa6`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0x130C	16435 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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