PDF malware analysis — malicious · 58d1fbc4d41a109b

MALICIOUS

PDF

4.4 KB

MD5: 20018f18095102cd51b8474b7081ef23 SHA-1: 85ec0d9efd01c91ccc62e3209a0094599a2a9f44 SHA-256: 58d1fbc4d41a109b7ec5fb9da8c48d3b4033f6e1cb1aea73c5237f51248a78e3

98 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1027 Obfuscated Files or Information

The PDF file contains an XFA form and triggers the CVE-2010-0188 heuristic, indicating exploitation of a LibTIFF vulnerability within Adobe Reader. The presence of ASCIIHexDecode and ASCII85Decode filters further suggests obfuscation of the exploit payload. The embedded artifact 'stream_000_off00000207.bin' is likely the decompressed exploit code.

Heuristics 5

Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188

PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_000_off00000207.bin` `5b6e0f900f5dda68d91b214012e87a018c706b50e7ddff72a5a534ed810d4754`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x207	13469 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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