PDF malware analysis — malicious · 536ec3277d092bf2

MALICIOUS

PDF

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

MD5: 8987673c407ef4589c07dca03692fdf5 SHA-1: a104b0e4ed868041f44d8280efde98626cc5e632 SHA-256: 536ec3277d092bf231f8f159f1f1b49ed9941776691a6e1f1a78e115cc09dce6

98 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-81' strongly indicates this PDF is malicious and designed to exploit vulnerabilities. The presence of embedded files, including one flagged as a script payload, further supports this. The document body contains obfuscated JavaScript-like content, suggesting an attempt to hide malicious code execution. The primary attack vector appears to be exploiting a PDF viewer vulnerability to drop and execute a secondary payload.

Heuristics 6

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 0xD7	67 bytes
`embedded_file_obj0009.bin` `e2e0f6c5cb2e0b2697da89386bfc3718eedaf1b6a2b1d24dd1176d27117bf77a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	781 bytes
`embedded_file_obj0010.bin` `45c6313a70c534019cc5824825e927269c8e9e5955559ca35419268e1686932d`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4BA	81 bytes
`embedded_file_obj0011.bin` `22e25d8cd5d7e373fb68bfb7b8179c308c10587858c4465768d6abda10a24d92`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x556	13799 bytes
`embedded_file_obj0012.bin` `103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x3B88	323 bytes
`embedded_file_obj0014.bin` `9342db065cdcaf52cc1c03a167a9ee6da4adf7b601ac8728eb048874abd6ddf7`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x3D15	161 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 0x3DFC	77 bytes
`embedded_file_obj0016.bin` `78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x3E90	68 bytes

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