PDF malware analysis — malicious · 793aae292efb1415

MALICIOUS

PDF

6.2 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap

MD5: 07023ece834758050c38c707dc4b5ccf SHA-1: a04142c94237e8c944e15131ae01ca42c66d8440 SHA-256: 793aae292efb1415ffa3b087170bc1e8a266ec8c176fbc8c0358921d14655e77

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains multiple high-severity heuristic firings related to XFA forms and embedded executable scripts, strongly indicating an exploit attempt. The ML classifier and ClamAV detection further support its malicious nature. The presence of embedded files, particularly 'embedded_file_obj0014.bin', suggests it acts as a dropper for a secondary payload. The document body is heavily obfuscated and does not provide clear user-facing content, reinforcing the focus on the embedded exploit.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

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.
ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
Embedded script payload in PDF stream medium 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.
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
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://ns.adobe.com/xtd/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `78f9631071f03cd2eafd8de565f399d0c62edde5175ed6f90c6215135b7f3b76`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xDB	134 bytes
`embedded_file_obj0010.bin` `d4ff871de6628873a7035e48c3dfa9affd8413c4e514b4f2b79a912efb0ddaf9`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1AA	712 bytes
`embedded_file_obj0011.bin` `1f3ae27cb1dc3d08ad29b80d368846d902b57811b329ebc3fef3aaaba2261a4c`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x4BD	455 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0012.bin` `103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x6CF	323 bytes
`embedded_file_obj0014.bin` `cc814e26a726a544467a8a5abc7700985c60a0b6bf0be0c5f1aee8e121354acf`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x870	12196 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 8 long base64-like blob(s).
`embedded_file_obj0015.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x1426	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x14BA	56 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.