PDF malware analysis — malicious · 7a1d3f88ef8395c6

MALICIOUS

PDF

15.3 KB Created: 2010-09-15 15:51:22 Authoring application: eff mas

MD5: 23f5f78f66ab19cef320d8eea395ea44 SHA-1: 42f9bf3fe22735c871994ccfa16834cbd38e1707 SHA-256: 7a1d3f88ef8395c6e10d0e73981c46bd8b11021138e3c81bbcbbfa5b5b78611b

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF sample contains critical XFA heap spray exploit code and risky executable scripts. The embedded file obj0005.bin is likely the second-stage payload. The exploit targets XFA forms, a known vector for arbitrary code execution.

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_obj0002.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xAB8	84 bytes
`embedded_file_obj0011.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xB6A	228 bytes
`embedded_file_obj0013.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xC5B	199 bytes
`embedded_file_obj0012.bin` `3c3b0fc7708060b48a4936222e137c95681c7df7e33be18b4e0278515be32da8`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xD4C	119 bytes
`embedded_file_obj0006.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xE02	77 bytes
`embedded_file_obj0017.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xEA9	56 bytes
`embedded_file_obj0005.bin` `860c4bafa418225ac2b7986598ac5b57032ec2a49e678236f4110d8a6a20e787`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x11E3	30196 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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