PDF malware analysis — malicious · 442ba616a66e084b

MALICIOUS

PDF

14.2 KB Created: 2010-09-17 02:42:55 Authoring application: vig ain

MD5: bfad4b90ece44fcd024e0ffd9c13b254 SHA-1: 0605162a95274bede5323ff94632255651bf7a86 SHA-256: 442ba616a66e084bae8c7a1af7ef0f7610c489e0564d5fee3b791097d6c981be

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains critical heuristic firings indicating XFA JavaScript heap-spray exploit code and embedded script payloads. The presence of XFA forms and the unescape() call strongly suggest an attempt to exploit a known vulnerability. The embedded file 'embedded_file_obj0004.bin' is likely the malicious payload. No specific family could be identified, but the attack pattern is consistent with a downloader or dropper.

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_obj0006.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xB2D	84 bytes
`embedded_file_obj0013.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xBDF	228 bytes
`embedded_file_obj0003.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0xCCF	199 bytes
`embedded_file_obj0016.bin` `be38da7bbd559808a9f57619067eff2979455adb545310d3fe2227d549b186fb`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xDC0	119 bytes
`embedded_file_obj0015.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xE78	77 bytes
`embedded_file_obj0012.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xF1F	56 bytes
`embedded_file_obj0004.bin` `cd69dbe2aec2b3420f8e15809e2d02bcd403f18d3553ac53b3271871336e9b94`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x1258	15610 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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