PDF malware analysis — malicious · eb75f78da2b072ba

MALICIOUS

PDF

12.2 KB Created: 2010-09-21 06:24:14 Authoring application: sod tye

MD5: 3c3eb411e1c9419b6b49b90a20287dc4 SHA-1: bbff3eb1eac9a947dd432256562ad41550563e56 SHA-256: eb75f78da2b072bad05ec8c8980d486745a3c117b93084b3225d0453550e476e

178 Risk Score

Malware Insights

The PDF sample contains critical XFA JavaScript heap-spray exploit code, indicated by the PDF_XFA_HEAP_SPRAY heuristic. This exploit is designed to download and execute a second-stage payload, likely embedded within the 'embedded_file_obj0013.bin' artifact. The presence of unescape calls and embedded script payloads further supports 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 0xB1F	84 bytes
`embedded_file_obj0012.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xBD1	228 bytes
`embedded_file_obj0007.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0xCC1	199 bytes
`embedded_file_obj0016.bin` `9e891cd1a6ab94755db8fc5f477c41c701acda5f3500a99ceaf050d9ba2153da`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xDB2	119 bytes
`embedded_file_obj0009.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xE69	77 bytes
`embedded_file_obj0006.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xF0F	56 bytes
`embedded_file_obj0013.bin` `8f5c9235c2d8c01d3a8f31c03b781947200c00b5ebcba655e75f1808aba4fda9`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x1248	11457 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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