PDF malware analysis — malicious · 811fe9f2d09f78a6

MALICIOUS

PDF

9.4 KB

MD5: 5281b4c54d4a28623d45168b95c8339b SHA-1: 76498a2ce58f7cbaf5016cc9f7c866da1f62f127 SHA-256: 811fe9f2d09f78a612b74d94a83d9ff7f773fb5e5da70445986f2f9c09807bd7

124 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Clickjacking T1059 Command and Scripting Interpreter T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains embedded JavaScript that exploits the CVE-2010-0188 vulnerability in Adobe Reader. This exploit is designed to download and execute a secondary payload from a remote location. The presence of XFA forms and embedded files further supports the exploitation vector. The extracted JavaScript is heavily obfuscated, but the core functionality appears to be payload delivery.

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.
Suspicious extracted artifact high 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
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
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 0x1079	85 bytes
`embedded_file_obj0042.bin` `dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91`	pdf-embedded-file	PDF EmbeddedFile object 42 at offset 0x112B	1029 bytes
`embedded_file_obj0063.bin` `b403e67d4e314298a64792c9db75b9d6f0f40a13455dc6e06623a2dc1ad67aa9`	pdf-embedded-file	PDF EmbeddedFile object 63 at offset 0x1344	8027 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 0x22A5	144 bytes
`embedded_file_obj0045.bin` `10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x2352	77 bytes
`xfa_base26_stage_000.js` `d8d3ec5f47d325a68c42d6909eb045895d79b4aacc4c4f8180318a569d1f0119`	deobfuscated-js	XFA base-26 decoded JavaScript (decompressed) at offset 0x1ADA	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` `ec48f7791599f7ca5ca2e4fc870eaae5a1a66c8cba5a9d2030c2445aafea9e12`	deobfuscated-js	PDF JavaScript deobfuscation pass	35823 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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