PDF malware analysis — malicious · 08af77c989d39d9b

MALICIOUS

PDF

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

MD5: 8e62dccc4a4fc1ace3ff07bcb078655e SHA-1: 9e932ddc60f7957b78e40a4f26fc5d0ee99c8ae2 SHA-256: 08af77c989d39d9b9da1cd64b2b3891f57500f57de4a082e4dbd890f52da4839

198 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains XFA forms and embedded JavaScript, which are leveraged to execute malicious code. Heuristics indicate the presence of an eval() call and an embedded script payload, strongly suggesting exploitation. The ClamAV detection 'Pdf.Exploit.Dropped-81' further confirms its malicious nature, likely acting as a dropper for further payloads.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 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.
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` `10524c8841105d398f3e8e8c790bc322eaa76a0f71d67929337ac5d9e1752e52`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	815 bytes
`embedded_file_obj0010.bin` `73ec5073804e2a11b9b416ec3d0b60ddf3db9ee1c7dbbd9d2aa922ca62c8163d`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4DC	80 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `cb1b80b5a7e4b21da37db80f15da5935184436f2c527014758517df6b74654e9`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x577	69382 bytes
`embedded_file_obj0012.bin` `6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x114C8	389 bytes
`embedded_file_obj0014.bin` `9f69c42e66b0c1666412737dc9cf4aa42379ee793c4ad8d07130781756ea33d5`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1169A	65 bytes
`embedded_file_obj0015.bin` `51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x11725	147 bytes

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