PDF malware analysis — malicious · 317a569ed36c4507

MALICIOUS

PDF

13.9 KB Created: 2010-09-07 13:22:23 Authoring application: kaf eel

MD5: b2b96141bb6a9317fa9314a84eb12ac1 SHA-1: c94e83af0b5d30559bc0bbda28ff9bd114c765d0 SHA-256: 317a569ed36c45075978cac67e092da7578d239b96c2e60e261a3c0c16759291

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059.001 PowerShell T1059.007 JavaScript

The critical PDF_XFA_HEAP_SPRAY heuristic indicates the presence of exploit code within the XFA form, specifically targeting a heap spray vulnerability. The PDF_UNESCAPE and PDF_XFA_SCRIPT heuristics further confirm the execution of risky script content. An embedded file, embedded_file_obj0007.bin, was also extracted, likely serving as the payload. The combination of these factors strongly suggests an exploit delivery mechanism.

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_obj0011.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xA98	84 bytes
`embedded_file_obj0017.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xB4A	228 bytes
`embedded_file_obj0014.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0xC3B	199 bytes
`embedded_file_obj0009.bin` `e1ad8cad149e79614ce5e559132f2d19831a60d893b6bbdf2c4d87983514044a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xD2B	119 bytes
`embedded_file_obj0010.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xDE3	77 bytes
`embedded_file_obj0002.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xE89	56 bytes
`embedded_file_obj0007.bin` `8bbd7a53b064e79a42da33d222fcfd7c3c1ca9ce5dd2a1962795d5a64f8c94b8`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x11C3	15367 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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