PDF malware analysis — malicious · d41ec63dd826c24b

MALICIOUS

PDF

12.5 KB Created: 2010-11-12 18:59:18 Authoring application: mon til

MD5: 294d1f5b3c17f13b37cf962aa9e74ab2 SHA-1: acc67da843edfcf33bdc8766d83846a6156f98d5 SHA-256: d41ec63dd826c24babcb5e8b4b01d3fa1d4bf2a2845e1003b4eb8ce702c4378e

270 Risk Score

Malware Insights

The PDF sample contains critical XFA heap spray exploit code and risky executable script within an XFA form. This indicates the document is designed to exploit a vulnerability in PDF readers that support XFA forms. The embedded script is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Pdf.Dropper.Agent-7308338-0' ClamAV detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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-7308338-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7308338-0
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_obj0015.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xD82	84 bytes
`embedded_file_obj0007.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0xE33	228 bytes
`embedded_file_obj0003.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0xF23	199 bytes
`embedded_file_obj0009.bin` `673744e36e917a619e6339420f4fe3e9cbb53c9113c9b88001ca07ebe64c4500`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x1013	119 bytes
`embedded_file_obj0017.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x10CB	77 bytes
`embedded_file_obj0012.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x1172	56 bytes
`embedded_file_obj0018.bin` `0f38a3e11655421baf67f71441dcf7557691ce16c882ec533e3b9121c94a0312`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x14AB	11095 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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