PDF malware analysis — malicious · 2a7f8545771629bb

MALICIOUS

PDF

29.3 KB Created: 2010-08-29 16:19:36 Authoring application: JurAd MykahzEmiw

MD5: e8ed4f14b3eefe7aad061a7f516b3bb8 SHA-1: cac6809ecd49c4e1d526c9fcc3baa207209483b9 SHA-256: 2a7f8545771629bbbb8a4ee718c1c475b8f07beb6855d36bc1e2ea7a1b280deb

270 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1059 Command and Scripting Interpreter

This PDF document contains a high-confidence exploit targeting PDF vulnerabilities, as indicated by multiple critical heuristic firings including ClamAV detections for 'Pdf.Exploit.Dropped-81' and 'Pdf.Exploit.Agent-36318' on an extracted artifact. The presence of XFA forms with executable scripts and embedded files strongly suggests the document is designed to deliver a malicious payload. The ML classifier output of 0.999996 further supports the malicious nature of this file.

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
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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
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://www.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x1AB	67 bytes
`embedded_file_obj0009.bin` `6b2260d3c78649345d3f0b850b831d545d33bb7017ccdf438cdfe1e9db7f2db2`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x238	294 bytes
`embedded_file_obj0010.bin` `5ff3ac2dd5f9c78d8bffa00d2fae2f779c276f2767cba0a34675560a82754d86`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x3A9	597 bytes
Detection ClamAV: Pdf.Exploit.Agent-36318 Obfuscation or payload: unlikely
`embedded_file_obj0011.bin` `e54608578a568afac9133fde7aca26cd7cedd8a558349bad718e25527e73d96f`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x649	26515 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 0x6E27	323 bytes
`embedded_file_obj0014.bin` `8db93690a0536def7d14e6f3b129243819eec624eb18b062240a0ea89d6a904a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x6FB4	182 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0015.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x70B0	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x7144	56 bytes

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