PDF malware analysis — malicious · 94e92f1d7c452efb

MALICIOUS

PDF

12.4 KB Created: 2011-01-10 13:37:06 Authoring application: dom mix

MD5: 75ab1768be94d924af82285df75e3f9c SHA-1: 91c8b65af3de962b89b045d60312b6ca55efee94 SHA-256: 94e92f1d7c452efb420429d9dbbc1a55a8998fc4dbbc9ea6d11025aedc6fe154

238 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains critical XFA heap spray exploit code, indicated by the PDF_XFA_HEAP_SPRAY and PDF_XFA_SCRIPT heuristics. This exploit is designed to download and execute a second-stage payload, as suggested by the PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_EMBEDDED heuristics. The ClamAV detection further confirms its malicious nature as a dropper.

Heuristics 8

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.
ClamAV: Pdf.Dropper.Agent-5961282-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-5961282-0
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_obj0013.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xD29	84 bytes
`embedded_file_obj0018.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0xDDB	228 bytes
`embedded_file_obj0002.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xECB	199 bytes
`embedded_file_obj0001.bin` `3e232d443565ce8d0a5e9a7ab69f5525b580cc19e9fda280a3380217e146750b`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0xFBB	119 bytes
`embedded_file_obj0011.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x1072	77 bytes
`embedded_file_obj0010.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1119	56 bytes
`embedded_file_obj0009.bin` `8bdc99e66e89d8f5601100035f70bfe58d46cc671be7ab8c1310d672a4d2272a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x1453	10974 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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