PDF malware analysis — malicious · 77b3a71cba786c8d

MALICIOUS

PDF

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

MD5: 3f3a8e00e15c490e8d20d2179abe6186 SHA-1: b34e1f6c2c2086cc32d3053e77c0023ca7b29567 SHA-256: 77b3a71cba786c8d2af12ca16e496342fa22cf66aefaebb26075d435d2dfe011

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded executable scripts and triggers a critical ClamAV detection for 'Pdf.Exploit.Dropped-81'. The presence of PDF_EVAL and PDF_XFA_SCRIPT heuristics indicates that the document attempts to execute code, likely to download and run a secondary payload. The embedded artifacts further support the malicious nature of the file.

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 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 0xD7	67 bytes
`embedded_file_obj0009.bin` `e2e0f6c5cb2e0b2697da89386bfc3718eedaf1b6a2b1d24dd1176d27117bf77a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	781 bytes
`embedded_file_obj0010.bin` `ad20ac4a4ae26d077e83c3e5a252a4d4ecda7d78e0685b1ad8c16c111de72bb3`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4BA	87 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `5316f1d10de031311ff8d3d292921976530031da321809bde89a62702df51275`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x55C	16107 bytes
`embedded_file_obj0012.bin` `103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x4492	323 bytes
`embedded_file_obj0014.bin` `1f4221f3c271d0f3238132e5f5dab398d0d20e1003905b3fff27860ae3b17fc2`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x461F	163 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 0x4708	77 bytes
`embedded_file_obj0016.bin` `78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x479C	68 bytes

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