PDF malware analysis — malicious · 685ec03a6a71dd02

MALICIOUS

PDF

6.0 KB Created: 2012-10-18 11:51:53 Authoring application: kkiiia=unescape(nehet.replace(/jjsjff/g, niittu.charAt(4

MD5: e86f7fb7c1e025bdb0cfe3574be68a2b SHA-1: ab50592d79894763dd77288dfb689b0c8bbb4880 SHA-256: 685ec03a6a71dd02d2a8fda1ec24f18acb2e3234cf8dba9080564b92120bb737

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document that leverages the CVE-2010-0188 exploit targeting Adobe Reader's LibTIFF component. This exploit allows for the execution of arbitrary code, likely to download and run a secondary payload. The presence of XFA forms and embedded scripts further supports the exploitation vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 9

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.
ClamAV: Pdf.Exploit.Gen-259 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Gen-259
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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
Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://ns.adobe.com/xdp/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0006.bin` `c09ae753ce4962d3d447f6ccdc05236eb9238277b66775a82f085f0fd265a84d`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x257	130 bytes
`embedded_file_obj0016.bin` `e402456431e20de9101da607824c30fc7cb983714079ea822be13e23d5e7bc85`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x4C6	119 bytes
`embedded_file_obj0001.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x59C	77 bytes
`embedded_file_obj0018.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x646	56 bytes
`embedded_file_obj0004.bin` `d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x74D	201 bytes
`embedded_file_obj0015.bin` `eca70874bad737bde9f4e4aa5552b4413112e5bccd69ebf3a6067de06d0caf99`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xAA8	35117 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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