PDF malware analysis — malicious · 7a08cde96bca6bc0

MALICIOUS

PDF

13.2 KB Created: 2010-11-25 07:43:02 Authoring application: jow pud

MD5: f419ca15db0ae79c328c6ded96030ee4 SHA-1: 3911c9f7d65c5d814b28d70e48b426e4216bbe52 SHA-256: 7a08cde96bca6bc0cffcedb79e7d32f071dfe6725e7fa0efacb843c735d692bf

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains critical XFA JavaScript heap-spray exploit code, as indicated by the PDF_XFA_HEAP_SPRAY heuristic. This exploit is designed to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded file object, embedded_file_obj0006.bin, likely contains the secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 8

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.
ClamAV: Pdf.Dropper.Agent-7275165-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7275165-0
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_obj0015.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xE7F	84 bytes
`embedded_file_obj0013.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xF31	228 bytes
`embedded_file_obj0016.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1022	199 bytes
`embedded_file_obj0001.bin` `5c8bc1da701b9bb7b14f4e78961bb6ab4b34f8206f55da594bd9d3831725bf90`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x1112	119 bytes
`embedded_file_obj0017.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x11C9	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1270	56 bytes
`embedded_file_obj0006.bin` `52b53c8e7af05f50f349d5ff830a4dbf77d8ac585e34c8292aa1e07be6e1bfc8`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x15A5	11879 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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