PDF malware analysis — malicious · 1992fc6fe2559bd6

MALICIOUS

PDF

13.5 KB Created: 2010-08-29 16:19:36 Authoring application: Qryqvjqyau Qgnfvmshajlcrayl

MD5: 47266364e6a925916f18ea95ba7cfdb2 SHA-1: 9e5dc002bd2a0e1aed0c3961c5c55f9a728a4a4b SHA-256: 1992fc6fe2559bd6a9d0ede12baec2de7a6bc891ebcb4872e420e24aa27995de

158 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains embedded JavaScript that is obfuscated and uses an eval() call, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF designed to exploit vulnerabilities and download a secondary payload from the provided URL.

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://www.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xtd/
- http://www.xfa.org/schema/xfa-form/2.8/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://ns.adobe.com/xdp/
- http://ns.adobe.com/xfdf/

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0014.bin` `c960a96860472f174f91e904ad09096893dce82f97f94698af9ad10120da8198`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0xA5	151 bytes
`embedded_file_obj0012.bin` `a5bffafabc1888cfb6bd349380f7cb66d97de140705778ab94fc6814a3c0b3fe`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x1E2	382 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x4A9	56 bytes
`embedded_file_obj0009.bin` `f71de64fbd4d5df8c59e5f3a6eb6c0ec2b6f82cf369f26f15812ace2276ca475`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x55B	292 bytes
`embedded_file_obj0008.bin` `04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x6C2	67 bytes
`embedded_file_obj0010.bin` `74e09160f0b7093f12c7897634c4b32a4d3747dad99ce1a305b784e28bf83dd5`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x8E0	562 bytes
`embedded_file_obj0011.bin` `eb7b936edd76e7e4183e5efe955ef1a5e832e383528c0f67f1a852076d8271c1`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xB57	10531 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`embedded_file_obj0015.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x34BF	77 bytes

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