PDF malware analysis — malicious · afabef51ac323355

MALICIOUS

PDF

11.0 KB

MD5: 13b5fa8eb14531dc5346f50a6c7c629a SHA-1: d01c5a9650e0f3a3bf690898335ecb81e0cdba34 SHA-256: afabef51ac323355158e8f13d64938a9ba860ae5cfd14e32e6eb0cc0f63799dd

86 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript that exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The deobfuscated JavaScript, named 'xfa_base26_stage_000.js', is indicative of a downloader or initial access stage. The embedded URL, while seemingly benign, is associated with the XFA structure and may be a decoy or part of the exploit chain. The primary attack vector is the exploitation of the PDF reader's vulnerability to execute arbitrary code.

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.
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
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www.xfa.org/schema/xfa-locale-set/2.1/

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0041.bin` `c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb`	pdf-embedded-file	PDF EmbeddedFile object 41 at offset 0xEED	85 bytes
`embedded_file_obj0042.bin` `dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91`	pdf-embedded-file	PDF EmbeddedFile object 42 at offset 0xF9F	1029 bytes
`embedded_file_obj0095.bin` `846e5a63a1fba6149807a0e11aa67a9db109246ed93e5623fa7a4638d1939e8f`	pdf-embedded-file	PDF EmbeddedFile object 95 at offset 0x11B8	12919 bytes
`embedded_file_obj0044.bin` `3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169`	pdf-embedded-file	PDF EmbeddedFile object 44 at offset 0x2750	144 bytes
`embedded_file_obj0045.bin` `10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x27FD	77 bytes
`xfa_base26_stage_000.js` `dd908269a681d00e08b20066424d5a9d18eff6633bb9e19be4a737422032dc14`	deobfuscated-js	XFA base-26 decoded JavaScript (decompressed) at offset 0x1726	4340 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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