PDF malware analysis — malicious · dac9cfd35c848f71

MALICIOUS

PDF

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

MD5: 91d9a34c2268193f57a7cc0c20784a96 SHA-1: a7e825c3d51c44bd2fab92f60de8feb30c456bc2 SHA-256: dac9cfd35c848f71260712377abe2d8bae8b507606318a7bf4663347e03eda85

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

This PDF file exhibits multiple high-severity heuristic firings related to XFA forms and eval() calls, indicating an exploit attempt. The ClamAV detection 'Pdf.Exploit.Dropped-81' strongly suggests it's a known exploit dropper. The embedded script payload and embedded file further support the conclusion that this document is designed to deliver a secondary malicious payload.

Heuristics 8

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
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 7

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 0xD7	67 bytes
`embedded_file_obj0009.bin` `173bd87906494960aa024c455d44b9a634f56efab750004116b9b7c1ed1590f8`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	790 bytes
`embedded_file_obj0010.bin` `5d98c2ea191da557e61dfe6adc326252dcdf6dea39a59a0cdb162ec6ee173931`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4C3	123 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `b342e12dad68db3ad2be8409a84f11b18829c5feab33b3118d72727839b152a1`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x589	72574 bytes
`embedded_file_obj0012.bin` `6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x12152	389 bytes
`embedded_file_obj0014.bin` `9f69c42e66b0c1666412737dc9cf4aa42379ee793c4ad8d07130781756ea33d5`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x12321	65 bytes
`embedded_file_obj0015.bin` `129e4e726ddafc353e13bd03f15fd4d48ceb50aa28924bc8b406e3be1073b46a`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x123A8	146 bytes

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