PDF malware analysis — malicious · 76077141c966d2c9

MALICIOUS

PDF

9.6 KB

MD5: 8af5b3124aa279094be2b873d7f7a498 SHA-1: 72177c97534e3838f7d2d85ce2e9ce767f9182f9 SHA-256: 76077141c966d2c9ea29d90842a27ba198326aadc6f383cd904fa411ae505225

158 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains a critical heuristic firing for CVE-2010-0188, indicating exploitation of a vulnerability in Adobe Reader's XFA form processing. The embedded JavaScript, identified as 'xfa_base26_stage_000.js', is likely responsible for executing the exploit and downloading a secondary payload. The presence of an embedded URL, 'http://testset.com', suggests a potential command and control or download source for the next stage.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
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://testset.com
- http://www.xfa.org/schema/xfa-locale-set/2.1/
- http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-data/1.0/

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 0xEBB	85 bytes
`embedded_file_obj0042.bin` `dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91`	pdf-embedded-file	PDF EmbeddedFile object 42 at offset 0xF6D	1029 bytes
`embedded_file_obj99999.bin` `08034fcf48bae74f8e26e4e2a38d8c8a90120e8e03d53dd6678ccc8a6150f6c3`	pdf-embedded-file	PDF EmbeddedFile object 99999 at offset 0x1189	24177 bytes
`embedded_file_obj0044.bin` `3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169`	pdf-embedded-file	PDF EmbeddedFile object 44 at offset 0x2128	144 bytes
`embedded_file_obj0045.bin` `10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x21D5	77 bytes
`xfa_base26_stage_000.js` `67a143c28cc68778934eb53548a9d27450e8c987468c7ab327aa2124cad8ce69`	deobfuscated-js	XFA separator-stripped base-26 decoded JavaScript (decompressed) at offset 0x1395	4172 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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