PDF malware analysis — malicious · def67c6f890611d5

MALICIOUS

PDF

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

MD5: 9c3883581714fdc1f4302ebafd68b02e SHA-1: 84b5373192c1079046fc93ec8a0f5ed8c049f10a SHA-256: def67c6f890611d59e132f49ec63c2d254fd89c3433c73d0cba8b0398f4fdb1f

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains a high-severity XFA form with executable script content, flagged by multiple heuristics including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-81'. The embedded script is likely responsible for downloading and executing a secondary payload, as indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'EXTRACTED_FILE_STATIC_TRIAGE' heuristics which noted script obfuscation and suspicious extracted artifacts. The primary IOC is the file's SHA256 hash.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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
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 0xDB	67 bytes
`embedded_file_obj0009.bin` `6b2260d3c78649345d3f0b850b831d545d33bb7017ccdf438cdfe1e9db7f2db2`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x167	294 bytes
`embedded_file_obj0010.bin` `32735645b64751b47cc4a1d4a02dd207fd8fa9ea25a78fb5bd5dda9b4c9d8a68`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x2D8	502 bytes
`embedded_file_obj0011.bin` `9f8e5cf02d996a6293a548d874608e1c604ae9459d3348595deb70a66767f2b6`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x519	23048 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 0x5F6C	323 bytes
`embedded_file_obj0014.bin` `6a34b324794c506fbd6dbfa05a2e584bfc5348352bd53c09255137659edd58cc`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x60F9	165 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 0x61E4	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x6278	56 bytes

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