PDF malware analysis — malicious · 250482c22e9522cd

MALICIOUS

PDF

12.4 KB Created: 2010-11-12 19:36:16 Authoring application: cod pop

MD5: 3169c065063cae3beebf572d8c05ee19 SHA-1: 7605b2804e0dc54ba9fb8a3275d966c23c08fbe6 SHA-256: 250482c22e9522cd64900825d0392488a6ac51cf141fea86addd30ecc497859d

208 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF file contains XFA form elements that trigger a heap spray exploit. The exploit code is embedded within a decompressed stream and is designed to execute arbitrary code. The ML classifier strongly indicates maliciousness. The embedded file 'embedded_file_obj0003.bin' is likely the second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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_obj0013.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xC55	84 bytes
`embedded_file_obj0010.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xD07	228 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xDF8	199 bytes
`embedded_file_obj0019.bin` `a8c6fdc47bbc90b2077575537a9b2253e91a4edd5d35cbd7219df9d90fbdde2e`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0xEE9	119 bytes
`embedded_file_obj0006.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xFA0	77 bytes
`embedded_file_obj0005.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x1046	56 bytes
`embedded_file_obj0003.bin` `2bd19ae2e6599074831b92d5c33f316a7195bf728271fedd29e36b99c9043e0b`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x137C	11164 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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