PDF malware analysis — malicious · d765669fd848c36b

MALICIOUS

PDF

12.2 KB Created: 2011-05-13 13:23:59 Authoring application: hen dig

MD5: dc4cc697a3247a4660ce98aecb57aac9 SHA-1: c7d1029bdf4efa1cdb454a6445b4f48955f91d1f SHA-256: d765669fd848c36b2b61c042fc7690fb6942fd868963ff463e974640ab5c2060

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains XFA (XML Forms Architecture) which is known to be a vector for exploits. High-severity heuristics indicate PDF_XFA_HEAP_SPRAY and PDF_XFA_SCRIPT, suggesting the presence of exploit code within the XFA form. The ML classifier strongly flags this PDF as malicious. An embedded file, 'embedded_file_obj0006.bin', was also detected, which is likely the secondary payload. The unescape() call and embedded script payload further support the exploitation of a vulnerability to execute arbitrary code.

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_obj0005.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0xAE3	84 bytes
`embedded_file_obj0004.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xB94	228 bytes
`embedded_file_obj0008.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC84	199 bytes
`embedded_file_obj0007.bin` `00a84800f10d924c3aff33730cd78b55b476ce909b5942ef78d1ced3b91f46b6`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0xD74	119 bytes
`embedded_file_obj0011.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xE2C	77 bytes
`embedded_file_obj0015.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xED3	56 bytes
`embedded_file_obj0006.bin` `bbadf416e83b7243a2a808863abe1d66619f997deec10eeab29209a37b0745f1`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x120B	11680 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).

Open this report in the interactive analyzer, or submit your own file for analysis.