PDF malware analysis — malicious · 289828a817602c29

MALICIOUS

PDF

11.8 KB Created: 2010-09-30 10:35:15 Authoring application: toe ohs

MD5: 4840cb326877134728a6132a67c326f5 SHA-1: b130719354d3d648f21da480f9adcf1d9db66912 SHA-256: 289828a817602c29d3314db6df56848b6d7416584706baa4be911185b27dbebe

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter T1059.007 JavaScript

The PDF sample contains critical XFA heap spray exploit code, triggered by JavaScript within the XFA form. This indicates an attempt to execute arbitrary code upon opening the document. The embedded file 'embedded_file_obj0002.bin' is likely the second-stage payload. No specific family could be identified.

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_obj0014.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0xA0E	84 bytes
`embedded_file_obj0011.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xAC0	228 bytes
`embedded_file_obj0010.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xBB1	199 bytes
`embedded_file_obj0017.bin` `435f1748e373593477be05ec3086e13e88088529ffca89e0e92d861c5aee639f`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xCA2	119 bytes
`embedded_file_obj0006.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xD59	77 bytes
`embedded_file_obj0005.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0xDFF	56 bytes
`embedded_file_obj0002.bin` `ad4e4a273ec97d8f38757868816ecda32054c2e92a692adc8f4a1fc307c3ce84`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x1137	11434 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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