PDF malware analysis — malicious · eac3af566f454981

MALICIOUS

PDF

9.6 KB

MD5: 2b400cbe3ac3ec7974d99f288999aa10 SHA-1: 812dd46fb4cd8f4dee1b7c5312436307a527fd9c SHA-256: eac3af566f454981ae18b0335905c904701be2138187dfe7c2085ce66079da20

88 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: JavaScript

The sample is a PDF document that leverages the CVE-2010-0188 vulnerability, which is known to target Adobe Reader's XFA forms. Static analysis identified deobfuscated JavaScript within the document, indicating an attempt to execute malicious code. This script likely downloads and executes a second-stage payload, as suggested by the embedded file artifacts and the nature of XFA exploits.

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 7

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 0x109C	85 bytes
`embedded_file_obj0042.bin` `dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91`	pdf-embedded-file	PDF EmbeddedFile object 42 at offset 0x114E	1029 bytes
`embedded_file_obj0063.bin` `02519dc1de124cbf6c2079de1cbe703cfac6119b32e9e13cbb2390de57527583`	pdf-embedded-file	PDF EmbeddedFile object 63 at offset 0x1367	8272 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`embedded_file_obj0044.bin` `3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169`	pdf-embedded-file	PDF EmbeddedFile object 44 at offset 0x234E	144 bytes
`embedded_file_obj0045.bin` `10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x23FB	77 bytes
`xfa_base26_stage_000.js` `d8d3ec5f47d325a68c42d6909eb045895d79b4aacc4c4f8180318a569d1f0119`	deobfuscated-js	XFA base-26 decoded JavaScript (decompressed) at offset 0x17B6	2146 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
`deobfuscated.js` `79cd52ce8c534cfe2a45d42bbb13b07c3f5ab960f35a8ec59c4beb1e13896bc7`	deobfuscated-js	PDF JavaScript deobfuscation pass	22040 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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