PDF malware analysis — malicious · 23fef85bb37acfa8

MALICIOUS

PDF

9.6 KB

MD5: 65abeb1ab7f7ea8a3d19cad0b12ca783 SHA-1: ab50f009a1eedd3c628f0b2ac6aa22c9faef9560 SHA-256: 23fef85bb37acfa81ef98b9f995968fe0e66d87449a8ba4baa3fe2861b333eac

124 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains an embedded XFA form that triggers a CVE-2010-0188 exploit. This exploit is designed to execute JavaScript, which is present in the extracted artifacts. The deobfuscated JavaScript likely downloads and executes a second-stage payload, indicated by the presence of suspicious encoded blobs and script obfuscation indicators. The embedded URL is likely part of the lure or exploit chain.

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 0x109C	85 bytes
`embedded_file_obj0042.bin` `dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91`	pdf-embedded-file	PDF EmbeddedFile object 42 at offset 0x114E	1029 bytes
`embedded_file_obj0063.bin` `4d8412e61d96c94b95ea1c8fdedce082c1f770bcb7364c4ce39e2d91242924f5`	pdf-embedded-file	PDF EmbeddedFile object 63 at offset 0x1367	8274 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 0x2337	144 bytes
`embedded_file_obj0045.bin` `10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x23E4	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` `a6f2589e2b6ac92677a1f07e4ed1b0898016825a4a33bf395cb07807a41e7191`	deobfuscated-js	PDF JavaScript deobfuscation pass	21983 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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