PDF malware analysis — malicious · 6e28a97be580c16b

MALICIOUS

PDF

17.0 KB Created: 2010-08-29 16:19:36 Authoring application: Vryyrubcsrq Gsnnppzn

MD5: 6aed43be09284010ceb21bd109df192e SHA-1: 654a527a4ce70a80aa65d31747726cfe4cc01e0d SHA-256: 6e28a97be580c16bc1a6ca5deb6bdc8653e4468233d299ae3de767ef3a6bd0d9

158 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains embedded scripts and an embedded file, triggering heuristics for PDF exploits and embedded payloads. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded script contains an eval() call and attempts to reconstruct a URL, likely for downloading a second-stage executable.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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://67.209.224.57/f.exe?&quot
- http://ns.adobe.com/xdp/
- http://ns.adobe.com/xtd/
- http://www.xfa.org/schema/xfa-data/1.0/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/
- 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 0x40	67 bytes
`embedded_file_obj0012.bin` `a5bffafabc1888cfb6bd349380f7cb66d97de140705778ab94fc6814a3c0b3fe`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xC8	382 bytes
`embedded_file_obj0014.bin` `cb4406b72b457543054aaa15c74630f91a3eb0dc01ff42d14b18c5d173e7987d`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x2EE	154 bytes
`embedded_file_obj0010.bin` `b8acbf58dfc01a8cecc54f2389639d29a776069d070d5de08debf4d748eb7000`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x625	556 bytes
`embedded_file_obj0011.bin` `b3a249ad6b02d60ddacb1f44245b385861987f1106a27c463e4ba1ece7f365e0`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x896	14039 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0009.bin` `f71de64fbd4d5df8c59e5f3a6eb6c0ec2b6f82cf369f26f15812ace2276ca475`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x3FB1	292 bytes
`embedded_file_obj0015.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x4150	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x4222	56 bytes

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