PDF malware analysis — malicious · ecf5f16ef2acd9d7

MALICIOUS

PDF

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

MD5: 7d4c7473107cdcdfdb7891e2416364db SHA-1: 76aa223081d982d2fd9ecd3dd5ea0b5c195c4cd3 SHA-256: ecf5f16ef2acd9d78d9bc1700df517a2af6170c2045d2b5dd7e043bb477633b0

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF document contains embedded executable scripts and an embedded file, as indicated by multiple PDF-specific heuristic firings including PDF_EVAL and PDF_XFA_SCRIPT. The ClamAV detection 'Pdf.Exploit.Dropped-81' strongly suggests a known exploit. The embedded script payload is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery.

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 0xDB	67 bytes
`embedded_file_obj0010.bin` `5f70b878e3d54dde19570d8a7ff0baeaff8a890ed05f630bed70eb78cbc4a245`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x168	779 bytes
`embedded_file_obj0011.bin` `959ee1448057f5b01621f6a25683fbba2fff793433b37bde51e6e98801a48bf7`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x4BE	444 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 0x6C5	323 bytes
`embedded_file_obj0014.bin` `d3e78cbcda14197af1d0dd9be8f040252b9c3e5d92c294f42183b8ebfafb3628`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x852	12382 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 0x38F6	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x398A	56 bytes

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