PDF malware analysis — malicious · 44ec99ea2339d3af

MALICIOUS

PDF

5.2 KB Created: 2011-04-05 23:46:28 Authoring application: bub lob

MD5: 567565b63f83565ac8b59507be783573 SHA-1: 8c9365d4c3eb1c67f0e355cb7eef04b01f885c66 SHA-256: 44ec99ea2339d3afa8818aece351ab51280cd592eadab6799bd23483e3774326

216 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

This PDF document exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms and LibTIFF image parsing. The heuristic firings indicate that the document contains an embedded script payload, which is likely responsible for delivering the malicious content. The extracted JavaScript file, stream_001_off00000324.js, is a strong indicator of the attack's execution flow, likely downloading and executing a second-stage payload.

Heuristics 7

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.
ClamAV: Pdf.Dropper.Agent-7166090-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7166090-0
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.
Suspicious extracted artifact medium 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.
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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off00000324.js` `8d26d426dcdfe80ee144d7c0968be850b16578889f136cdde96d73a6f57ca717`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x324	52189 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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