PDF malware analysis — malicious · 4bbe8fe4b4ec2063

MALICIOUS

PDF

14.9 KB Created: 2010-09-09 12:15:46 Authoring application: sew mus

MD5: 2ca1a5eebc2dcd283c1ec9f11fa0551b SHA-1: 76a23cbb745429e27c977c36ac8f7984c2a08d05 SHA-256: 4bbe8fe4b4ec2063d19c92ed7c611d6f37d8dd29f355a2b201c4deac054faeef

178 Risk Score

Malware Insights

The PDF file contains critical XFA JavaScript heap-spray exploit code, indicating an attempt to execute arbitrary code. The presence of embedded files, including a suspicious artifact named 'embedded_file_obj0014.bin', further supports this. The exploit targets a known vulnerability within XFA forms, likely to download and execute a second-stage payload.

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_obj0019.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0xC46	84 bytes
`embedded_file_obj0017.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xCF8	228 bytes
`embedded_file_obj0010.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xDE9	199 bytes
`embedded_file_obj0008.bin` `11228626e4c34c6fe871c46be0381ef50ec97a30e7b6903482f57661959dbb26`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xED9	119 bytes
`embedded_file_obj0006.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xF90	77 bytes
`embedded_file_obj0015.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x1037	56 bytes
`embedded_file_obj0014.bin` `7674942f315c33f57f8b049168935feedeed0c340cf9104beb84794bf73aa4dd`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1371	16545 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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