PDF malware analysis — malicious · a1fa578df10b23e8

MALICIOUS

PDF

10.6 KB

MD5: ee72df7abb907f8782a193b7f096cdbb SHA-1: 220c2b7824c3b0b1460355fe7c90ac7eacc50ec0 SHA-256: a1fa578df10b23e8d00cd433291c5047beb287da2feebc7c9f0e031fc0125b65

116 Risk Score

Malware Insights

The PDF file contains a critical heuristic firing for CVE-2010-0188, indicating an exploit targeting Adobe Reader's LibTIFF XFA image processing. A deobfuscated JavaScript file was extracted, which likely contains the malicious payload. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely benign, but the exploit and script are the primary indicators of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 0xEB5	85 bytes
`embedded_file_obj0042.bin` `dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91`	pdf-embedded-file	PDF EmbeddedFile object 42 at offset 0xF67	1029 bytes
`embedded_file_obj99999.bin` `349a4a117cb5ff5026c1eb5c602b17f7b338f130f8a6f18948d746c3f89a896b`	pdf-embedded-file	PDF EmbeddedFile object 99999 at offset 0x1183	25051 bytes
`embedded_file_obj0044.bin` `3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169`	pdf-embedded-file	PDF EmbeddedFile object 44 at offset 0x2524	144 bytes
`embedded_file_obj0045.bin` `10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275`	pdf-embedded-file	PDF EmbeddedFile object 45 at offset 0x25D1	77 bytes
`xfa_base26_stage_000.js` `8594918b313c3f67f23783100391d0f126a492545544cab5c0a3298be13adfd1`	deobfuscated-js	XFA separator-stripped base-26 decoded JavaScript (decompressed, XML-entity decoded) at offset 0x136C	4328 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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