PDF malware analysis — malicious · 5592cd695b0d4dbf

MALICIOUS

PDF

14.2 KB Created: 2011-04-21 00:09:45 Authoring application: ban ays

MD5: 60bb827ece5f290a847044bef8c1a682 SHA-1: a0fa377a3454c9ed0ec9cfa6ef427ec0b9f0e917 SHA-256: 5592cd695b0d4dbf981627394db2a34b1da6478f51f6f9c44afece298acc44b1

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF sample contains multiple high-severity heuristic firings indicating the presence of executable JavaScript and embedded content. Specifically, PDF_EVAL and PDF_UNESCAPE suggest the use of JavaScript functions commonly employed for obfuscation and payload delivery. The PDF_XFA_SCRIPT firing confirms that risky executable script is present within an XFA form. The embedded script payload, marked by PDF_EMBEDDED_SCRIPT_PAYLOAD, likely attempts to download and execute a secondary payload, as indicated by the suspicious extracted artifact 'embedded_file_obj0017.bin'. The confidence is reduced due to the lack of specific IOCs like URLs or hashes being directly extractable from the provided evidence.

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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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 0x1953	84 bytes
`embedded_file_obj0015.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x1A05	228 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x1AF6	199 bytes
`embedded_file_obj0005.bin` `be13c4a43ac065f6ccf45048e87ee24d398e3da747a9a90f6691f0de89e7e2e0`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x1BE7	154 bytes
`embedded_file_obj0008.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x1CB8	77 bytes
`embedded_file_obj0009.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x1D5E	56 bytes
`embedded_file_obj0017.bin` `57e0ee4e90fb492f3b48a396ce6f36ac92270d22c171b34dac117288a7ece4ba`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x20DE	20507 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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