PDF malware analysis — malicious · ac6df81c9477ffe2

MALICIOUS

PDF

7.0 KB Created: 2011-03-11 23:35:35 Authoring application: ire sec

MD5: 86c56a4f79bada7b5e28b4c34e8793b3 SHA-1: b7e0d54c390fb603fba0d48d56b41b6100f55435 SHA-256: ac6df81c9477ffe2b3f4b130949866eec3b08d718ea3b0a5dec09c071690a5c5

138 Risk Score

Malware Insights

MITRE ATT&CK

T1071 Application Layer Protocol

The sample is a PDF document that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF XFA image processing. The critical heuristic firing indicates that the PDF contains a decoded XFA payload designed to exploit this vulnerability. The PDF also contains embedded files and a script payload, suggesting it's a downloader or dropper for further malicious activity. The document body contains text related to gambling lures, which is likely a social engineering tactic to entice users to open the malicious PDF.

Heuristics 6

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

PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
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_obj0013.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x739	84 bytes
`embedded_file_obj0005.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x7EA	228 bytes
`embedded_file_obj0003.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x8DA	199 bytes
`embedded_file_obj0011.bin` `f005d0456403c575feb1b037bd37568680c33deb77c0e2391460604dd2723fac`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x9CC	154 bytes
`embedded_file_obj0010.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xA9E	77 bytes
`embedded_file_obj0017.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xB45	56 bytes
`embedded_file_obj0009.bin` `677d4befbda4d7007f54acf4e29fa119759ee8b74c7e85e9a45228a302bfb711`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xEC5	8731 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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