PDF malware analysis — malicious · 4fc6f4256e872690

MALICIOUS

PDF

21.1 KB Created: 2010-08-31 10:32:31 Authoring application: partHam modPart

MD5: 6e6344b8ee1789220c07702f1bbbcad4 SHA-1: 3275435475456d43d59a05e55056276536b43e6c SHA-256: 4fc6f4256e872690a0caabf604798ec476cf8851c2e57592d13e172b9660610d

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The sample is a PDF file that contains XFA (XML Forms Architecture) which is known to be a vector for exploits. Critical heuristics indicate PDF_XFA_HEAP_SPRAY and PDF_XFA_SCRIPT, suggesting the presence of exploit code designed to spray the heap and execute arbitrary code. An embedded script payload was also detected. The primary attack pattern involves leveraging these XFA vulnerabilities to deliver a malicious payload, likely downloaded from an embedded artifact.

Heuristics 6

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.
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_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x1732	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x17E3	228 bytes
`embedded_file_obj0010.bin` `d1d6e94d506cabb83649a42c14bed2604a1c8360fd3bd1c886c37fa5777789d0`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x18D6	28103 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x4BDE	199 bytes
`embedded_file_obj0012.bin` `1c09e9a4ebf7b535de1a79371f516b4d105769409677a4c4c0460e08b6b5bf6e`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x4CD0	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4D91	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4E38	56 bytes

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