PDF malware analysis — malicious · f05419bfc70c0216

MALICIOUS

PDF

11.9 KB Created: 2011-02-13 19:11:31 Authoring application: rub ebb

MD5: 79efffcf7ecdfe0f9dc87f2491c72c59 SHA-1: 85c9bab236da7e5eeb884c057ce72b0c8cfea6f5 SHA-256: f05419bfc70c02164a91a3754e03a9100ec78cb1aec628009f23bf9c040bd701

178 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 multiple heuristic firings. This exploit code is designed to execute arbitrary code when the PDF is opened. An embedded file, 'embedded_file_obj0015.bin', was also extracted, likely serving as the second-stage payload. The specific exploit targets XFA forms, a known vector for PDF-based attacks.

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_obj0012.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x9BA	84 bytes
`embedded_file_obj0011.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xA6C	228 bytes
`embedded_file_obj0007.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0xB5C	199 bytes
`embedded_file_obj0001.bin` `3d17baed373d97138d9ce247bfab1ff3d4a6fe15165a1584e112c7d8a6911e01`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0xC4C	119 bytes
`embedded_file_obj0010.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xD03	77 bytes
`embedded_file_obj0013.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xDAA	56 bytes
`embedded_file_obj0015.bin` `dc0fd94a9b5dce2e9f769bfd9c98f28ba954dbbc0516b4e1c68dec07cfc90808`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x10E2	11751 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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