PDF malware analysis — malicious · 95ab333418510aa8

MALICIOUS

PDF

12.2 KB Created: 2011-01-14 06:37:50 Authoring application: loo fox

MD5: 49728f4810b6acc6737dcfcc69b5e762 SHA-1: 9f959e77a81e1c0f8fdff93eee47b0c5b246173f SHA-256: 95ab333418510aa81e788102ff13a640049440d87a2ca7702236c5372b1a83f7

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 file contains XFA form elements with JavaScript that triggers a heap spray exploit. This exploit is designed to download and execute a secondary payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic and the presence of an embedded file artifact. The specific exploit mechanism points to a common technique for delivering further malicious content.

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 0xACF	84 bytes
`embedded_file_obj0008.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xB80	228 bytes
`embedded_file_obj0015.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xC71	199 bytes
`embedded_file_obj0019.bin` `791bb038e8b287c395c441e188e9fbe8ec2f5b0b17cc3eb2bad6de812b5d8bd3`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0xD62	119 bytes
`embedded_file_obj0016.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xE1A	77 bytes
`embedded_file_obj0011.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xEC1	56 bytes
`embedded_file_obj0013.bin` `4d21eac885714bbf453d62a5e8f5602ac8be4c68cf810cb01827d9c899e8b871`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x11F8	11571 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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