PDF malware analysis — malicious · 96702af0c5928de5

MALICIOUS

PDF

11.8 KB Created: 2010-09-15 17:41:36 Authoring application: fet rei

MD5: 1d847e4063f60a94e53d1766fea96bf6 SHA-1: 134c9a249fb53cb7ab5c7144a86f6b4fbf93d89c SHA-256: 96702af0c5928de56ad4cdacb855542a233b0e153d3eabb90edca11a68707f7c

178 Risk Score

Malware Insights

The PDF sample contains critical XFA JavaScript heap-spray exploit code, indicating it is designed to execute arbitrary code. The presence of embedded files, including a larger artifact named 'embedded_file_obj0006.bin', suggests a downloader or dropper functionality. The unescape() call and embedded script payload further support the malicious intent.

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 0x7D7	84 bytes
`embedded_file_obj0001.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x888	228 bytes
`embedded_file_obj0015.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x979	199 bytes
`embedded_file_obj0009.bin` `e326f43588b78c57514310f82f31cf661e9b47b2e5acd9c8e22682924ea9059e`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xA69	119 bytes
`embedded_file_obj0012.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xB21	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xBC8	56 bytes
`embedded_file_obj0006.bin` `1254ce988bf3fffa1651068e4451a9d8457e5e60700edc523b227116a5b424eb`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xF01	26428 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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